Eternal security is true when you're abiding in Christ.
John 10:29 My Father, who has given them to Me, is greater than all; and no one is able to snatch them out of My Father’s hand.
"Snatch them out" equates to a third party doing the snatching. You are eternally secured and protected while you're abiding in Christ and no one can snatch you out. But if you want to freely walk out, God will not force you to stay.
2 Thessalonians 3:3 But the Lord is faithful, who will establish you and guard you from the evil one.
Really ho wants to walk out on their sins being freely forgiven:
Psalm 100:4
Enter his gates with
thanksgiving and his courts with
praise; give thanks to him
and praise his name.
Psalm 103:12New International Version (NIV)[SUP]
12 [/SUP]as far as the east is from the west,
so far has he removed our transgressions from us.
Matthew 9:2
Some men brought to him a paralyzed man, lying on a mat. When Jesus saw their faith, he said to the man, “Take heart, son; your sins are
forgiven.”
Matthew 9:5
Which is easier: to say, ‘Your sins are
forgiven,’ or to say, ‘Get up and walk’?
Matthew 26:28
This is my blood of the covenant, which is poured out for many for the
forgiveness of sins.
Luke 7:47 [Full Chapter]
Wherefore I say unto thee, Her sins, which are many, are
forgiven; for she loved much: but to whom little is
forgiven,
the same loveth little.
Ephesians 1:7
in whom we have redemption through his blood, the
forgiveness of sins, according to the riches of his grace;
Ephesians 4:32
and be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ’s sake hath
forgiven you.