So could he use a past tense for a future certainty in other passages, like Heb 10, right?
That's NOT what we have in 1 Cor 15:1-2, no matter how much you desire it to be so. The chapter, from the very first verse, is talking about whether there is such a thing as resurrection from the dead. And for those who don't believe there is, Paul takes great pains to explain to them that they are without hope (their "faith is vain") without the resurrection.
Which is not what you keep saying the passage means.
That may be so, but it is a nonsequitor about believing in vain.
If there's no resurrection, even the most sincere of believers has believed in vain--that was Paul's message, no matter hiw many times you repeat your false use of the passage.
So what you have done is not to assure believers that they are forever saved, but to give them doubts as to whether their belief is good enough to merit salvation. Why is that helpful? Doesn't that put salvation back into the world category?
And I thought the whole idea of OSAS was to put a Christian's mind at ease. You've help to move me away from the OSAS position.
I have never met a single person who "believed" Jesus...
Jesus said,
15 If ye love me, keep my commandments. 16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;v17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
18 I will not leave you comfortless: I will come to you. 19 Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also. 20 At that day ye shall know that I am in my Father, and ye in me, and I in you.
21 He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
22 Judas saith unto him, not Iscariot, Lord, how is it that thou wilt manifest thyself unto us, and not unto the world?
23 Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him. 24 He that loveth me not keepeth not my sayings: and the word which ye hear is not mine, but the Father's which sent me. (John 14)
THE ADOPTION OF SONS...
22 Then the Lord God said, “Behold, the man has become like one of Us, to know good and evil. And now, lest he put out his hand and take also of the tree of life, and eat, and live forever”— 23 therefore the Lord God sent him out of the garden of Eden to till the ground from which he was taken. 24 So He drove out the man; and He placed cherubim at the east of the garden of Eden, and a flaming sword which turned every way, to guard the way to the tree of life.
This "Tree of Life" is Jesus.
There is only ONE GOOD TREE...
39 And he spake a parable unto them, Can the blind lead the blind? shall they not both fall into the ditch? 40 The disciple is not above his master: but every one that is perfect shall be as his master. 41 And why beholdest thou the mote that is in thy brother's eye, but perceivest not the beam that is in thine own eye? 42 Either how canst thou say to thy brother, Brother, let me pull out the mote that is in thine eye, when thou thyself beholdest not the beam that is in thine own eye? Thou hypocrite, cast out first the beam out of thine own eye, and then shalt thou see clearly to pull out the mote that is in thy brother's eye. 43 For a good tree bringeth not forth corrupt fruit; neither doth a corrupt tree bring forth good fruit. 44 For every tree is known by his own fruit. For of thorns men do not gather figs, nor of a bramble bush gather they grapes. 45 A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.
ONLY ONE GOOD TREE...
46 And why call ye me, Lord, Lord, and do not the things which I say? 47 Whosoever cometh to me, and heareth my sayings, and doeth them, I will shew you to whom he is like:
THE WISE...
48 He is like a man which built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock.
THE FOOLISH...
49 But he that heareth, and doeth not, is like a man that without a foundation built an house upon the earth; against which the stream did beat vehemently, and immediately it fell; and the ruin of that house was great. (Luke 6)
THE ONLY PRESEDTINATION...
24 God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; 25 Neither is worshipped with men's hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things; 26 And hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation; 27 That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us: 28 For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring. 29 Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device. 30 And the times of this ignorance God winked at; but now commandeth all men every where to repent: 31 Because he hath appointed a day, in the which he will judge the world in righteousness by that man whom he hath ordained; whereof he hath given assurance unto all men, in that he hath raised him from the dead. (Acts 17)
DESERVESA REPEAT: 27 "That they should seek the Lord, if haply they might feel after him, and find him"
DERSERVESA REPEAT: “Behold, the man has become like one of Us, to know good and evil. And now, lest he put out his hand and take also of the tree of life, and eat, and live forever”
God predestined the "Adoption." He made what was not His, His...
11 He came to His own, and His own did not receive Him. 12 But as many as received Him, to them He gave the right to become children of God, to those who believe in His name: 13 who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God. (John 1)
God has chosen... Things which are not, to bring to nothing the things that are...
27 But God has chosen the foolish things of the world to put to shame the wise, and God has chosen the weak things of the world to put to shame the things which are mighty; 28 and the base things of the world and the things which are despised God has chosen, and the things which are not, to bring to nothing the things that are, 29 that no flesh should glory in His presence. 30 But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption— 31 that, as it is written, “He who glories, let him glory in the Lord.” 1 Cor 1
God chooses holy behaviors and NOT THE FALLEN PERSON, "4 just as He chose us [to be Obedient] in Him before the foundation of the world, that we should be holy and without blame before Him in love," (Ephesians 1)
THIS IS GOD'S GRACE...
13 For if we are beside ourselves, it is for God; or if we are of sound mind, it is for you. 14 For the love of Christ compels us, because we judge thus: that if One died for all, then all died; 15 and He died for all, that those who live should live no longer for themselves, but for Him who died for them and rose again. (2 CORINTHIANS 5)
DESERVES A REPEAT: "That if One died for all, then all died; He died for all, that those who live should live no longer for themselves, but for Him who died for them and rose again."
THIS IS GOD'S FREE GIFT OF GRACE...
God, who is rich in mercy, because of His great love with which He loved us, 5 even when we were dead in trespasses, made us alive together with Christ — by grace you have been saved. (EPHESIANS 2)
DESERVES A REPEAT: "Even when we were dead in trespasses, made us alive together with Christ"
THIS IS GOD'S FREE GIFT OF GRACE...
10 For the death that Jesus died, He died to sin once for all; but the life that He lives, He lives to God. 11 Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord.
12 Therefore do not let sin reign in your mortal body, that you should obey it in its lusts. 13 And do not present your members as instruments of unrighteousness to sin, but present yourselves to God as being alive from the dead, and your members as instruments of righteousness to God. 14 For sin shall not have dominion over you, for you are not under law but under grace. (ROMANS 6)
DESERVES A REPEAT: "For sin shall not have dominion over you, for you are not under law but under grace."
Life in Jesus Christ is a Choice, and those who don't choose Christ, God's wrath remains on them (John 3:35-36)
God calls out to everyone to repent.
God’s Righteousness Through Faith...
21 The righteousness of God apart from the law is revealed, being witnessed by the Law and the Prophets, 22 even the righteousness of God, through faith in Jesus Christ, to all and on all who believe. For there is no difference; 23 for all have sinned and fall short of the glory of God, 24 being justified freely by His grace through the redemption that is in Christ Jesus, 25 whom God set forth as a propitiation by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed, 26 to demonstrate at the present time His righteousness, that He might be just and the justifier of the one who has faith in Jesus. (Romans 3)
DESERVES A REPEAT: "to all and on all who believe"
THIS IS God's GRACE...
16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. 17 For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.
18 “He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that the light has come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For everyone practicing evil hates the light and does not come to the light, lest his deeds should be exposed. 21 But he who does the truth comes to the light, that his deeds may be clearly seen, that they have been done in God.” (JOHN 3)
DESERVES A REPEAT; GOD'S FREE GIFT OF GRACE: "that whoever believes in Him should not perish but have everlasting life."
11 For the grace of God that brings salvation has appeared to all men, 12 teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly in the present age, 13 looking for the blessed hope and glorious appearing of our great God and Savior Jesus Christ, 14 who gave Himself for us, that He might redeem us from every lawless deed and purify for Himself His own special people, zealous for good works.
15 Speak these things, exhort, and rebuke with all authority. Let no one despise you. (TITUS 2)
34 For He [Jesus] whom God has sent speaks the words of God, for God does not give the Spirit by measure. 35 The Father loves the Son, and has given all things into His hand. 36 He who believes in the Son has everlasting life; and he who does not believe the Son shall not see life, but the wrath of God abides on him.” (JOHN 3)
Do you "Believe the Son?"
34 Then Peter opened his mouth and said: “In truth I perceive that God shows no partiality. 35 But in every nation whoever fears Him and works righteousness is accepted by Him. 36 The word which God sent to the children of Israel, preaching peace through Jesus Christ—He is Lord of all— 37 that word you know, which was proclaimed throughout all Judea, and began from Galilee after the baptism which John preached: 38 how God anointed Jesus of Nazareth with the Holy Spirit and with power, who went about doing good and healing all who were oppressed by the devil, for God was with Him. 39 And we are witnesses of all things which He did both in the land of the Jews and in Jerusalem, whom they killed by hanging on a tree. 40 Him God raised up on the third day, and showed Him openly, 41 not to all the people, but to witnesses chosen before by God, even to us who ate and drank with Him after He arose from the dead. 42 And He commanded us to preach to the people, and to testify that it is He who was ordained by God to be Judge of the living and the dead. 43 To Him all the prophets witness that, through His name, whoever believes in Him will receive remission of sins.” (Acts 10)
DESERVES A REPEAT: "But in every nation whoever fears Him and works righteousness is accepted by Him," and "The word which God sent to the children of Israel, preaching peace through Jesus Christ—He is Lord of all—
Jesus Promises Another Helper
15 “If you love Me, keep My commandments. 16 And I will pray the Father, and He will give you another Helper, that He may abide with you forever— 17 the Spirit of truth, whom the world cannot receive, because it neither sees Him nor knows Him; but you know Him, for He dwells with you and will be in you. 18 I will not leave you orphans; I will come to you. (John 14)