Even a few minutes of honest reflection and self-examination will convict a man of a vast expanse of sin in his life. Even a redeemed individual will see regular influence of the flesh and ungodly desires in the actions of his life and motives.
Sometimes glimpses into the darkness of the soul will leave one in despair — will God forgive me again? How could He forgive me again? What right have I to ask for this forgiveness again?
John Newton knew of that kind of reflection — and of the grace of God to continue to forgive. Read carefully the stanza of this hymn that he wrote to communicate the grace of God to continue to forgive the sins of redeemed sinners:
True, I’ve been a foolish creature,
And I’ve sinned against his grace,
But forgiveness is his nature,
Though he justly hides his face;
Ere he called me, well he knew
What a heart like mine would do.
Reflecting on this stanza, writer Todd Murray notes:
I find such comfort in this reminder that, while I continue to be discouraged, and at times even shocked, by my ongoing struggle with sin, God is not surprised by it. He has always known the depths of wickedness in my heart, and yet he has chosen to love me, forgive me and, one day, will fully perfect me.

God’s purpose for making his only begotten to die and through his death redeem us from the power of sin is to make us fit for the kind of life he want us to live ( the supernatural ). Sin not
What about Hebrews chapter 6:4-6 and again Hebrews 10:26-29?