I want to find out whether eternal security is really true. I want to believe yes. There are people however who claim to have lost their faith, they say it was due to sin and they can no longer believe anymore even if they want to. That is concerning to hear, and also then there are those who simply just stopped believing.
How can we believe in eternal security with these kind of testimony?
The fact is you don't need to believe in eternal security to have God's forgiveness. People who feel they have outsinned God's grace, have believed a lie from satan. While we are willing to seek the LORD, He is willing to forgive. This is because the cross covers a lifetime of sins.
Heb 9:27-28 And as it is appointed for men to die once, but after this the judgment, so Christ was offered once to bear the sins of many.
2Ch 15:2 And he went out to meet Asa, and said to him: "Hear me, Asa, and all Judah and Benjamin. The LORD is with you while you are with Him. If you seek Him, He will be found by you; but if you forsake Him, He will forsake you.
Jas 5:19-20 Brethren, if anyone among you wanders from the truth, and someone turns him back, let him know that he who turns a sinner from the error of his way will save a soul from death and cover a multitude of sins.
1Jn 5:16 If anyone sees his brother sinning a sin which does not lead to death, he will ask, and He will give him life for those who commit sin not leading to death. There is sin leading to death. I do not say that he should pray about that.
1Jn 1:9 If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
Eze 18:32 For I have no pleasure in the death of one who dies," says the Lord GOD. "Therefore turn and live!"
Eternal security is not of God either, a person can walk away from God, and if they die in sin can not be restored.
Heb 6:4-6 For it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit, and have tasted the good word of God and the powers of the age to come, if they fall away, to renew them again to repentance, since they crucify again for themselves the Son of God, and put Him to an open shame.
Note Hebrews 6 states the believer who falls away is "crucifying Christ again", the only way for the cross to not be available is if they have died in sin. Because according to Heb 9:27-28 the cross covers a lifetime of sins, a righteous life, for a sinful one. Hebrews 6 then is not referring to a person who may have fallen into sin, and is seeking restoration, by one who walks away from God is overcome by sin and does not return.