How do I know I am truly saved by God (Jesus Christ)?
Is it possible/probable I will be lost again?
How to be 100% guaranteed that I am saved without any chance of being lost again?
Luke 22:20 And in the same way He took the cup after they had eaten, saying, “This cup, which is poured out for you, is the new covenant [ratified] in My blood.
(MY NOTE: Jesus sin atoning payment began a new covenant replacing the old. Christ's resurrection is proof God accepted Christ's sin payment)
Heb 7:
11 Now if perfection [a perfect fellowship between God and the worshiper] had been attained through the Levitical priesthood (for under it the people were given the Law) what further need was there for another and different kind of priest to arise, one in the manner of Melchizedek, rather than one appointed to the order of Aaron?
(MY NOTE: Jesus retired the Mosaic covenant, see Matt 27:51)
12 For when there is a change in the priesthood, there is of necessity a change of the law as well.
17 For it is attested [by God] of Him, “You (Christ) are a Priest forever according to the order of Melchizedek.”
21 (for those Levites who formerly became priests [received their office] without [its being confirmed by the taking of] an oath, but this One [was designated] with an oath through the One who said to Him, “The Lord has sworn And will not change His mind or regret it, ‘You (Christ) are a Priest forever’”).
(MY NOTE: The Levitical priesthood RETIRED/REPLACED/NOW OBSOLETE)
22 And so [because of the oath’s greater strength and force] Jesus has become the certain guarantee of a better covenant [a more excellent and more advantageous agreement; one that will never be replaced or annulled].
(MY NOTE: Jesus is NOW! High Priest (mediator between God & man) forever! He administers a New Better sin administration & a Better law covenant. (Reread vs 12 above)
Heb 8:6 - But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.
(MY NOTE: Jesus has ALREAD obtained & NOW mediates a New BETTER covenant (then Mosaic) Jesus Melchizedek Priesthood covenant is established upon BETTER promises.)
I believe it's time to place the Mosaic covenant on the ash pile of history where Jesus death & resurrection retired it to:
Matt 27:51 And [at once] the veil [of the Holy of Holies] of the temple was torn in two from top to bottom; the earth shook and the rocks were split apart.
(MY NOTE: Jesus death tears Temple veil (this veil separated Holy God's presents from sinful man) is torn in 1/2. Next, the New ETERNAL Melchizedek Priesthood covenant begins in resurrection power 3 days later. It's 1st implementation is seen here:
Acts 2:4 And they were all filled [that is, diffused throughout their being] with the Holy Spirit and began to speak in other tongues (different languages), as the Spirit was giving them the ability to speak out [clearly and appropriately].
The Holy Spirit of God indwelt believers = New Melchizedek Priesthood Covenant. God's presents no longer dwells (nor ever again will) in a Tabernacle or Temple (Mosaic covenant) inner sanctuary/Holy of Holies, made with human hands.)
Every REDEEMED believers is NOW a Temple where a Holy God's Spirit forever indwells. Once indwelt/baptized with Christ's Holy Spirit. The believers eternal fate is securely SEALED (Eph 4:30, 2 Cor 1:22, 5:5, 2 Tim 1:14, Jn 10:28-29, Rom 8:35-39)