Grace is a supremely important doctrine.
20 I have been crucified with Christ; and it is no longer I that live, but Christ liveth in me: and that life which I now live in the flesh I live in faith, the faith which is in the Son of God, who loved me, and gave himself up for me. I do not make void the grace of God: for if righteousness is through the law, then Christ died for nought.
It is probable that the purpose of creating man was that the Lord might exhibit His attribute of grace. Holy angels sinned, & were doomed to the Lake of Fire. There is no atonement for the sins of angels. God did not become an angel and die to pay for the sins of angels.
But right away when Adam sinned, we can see: the Lord seeking Him and clothing Adam with animal skins, implying the shedding of blood & picturing the believer in Christ putting on Christ, having Christ's righteousness. Grace, unmerited favor, even favor contrary to merit. The ultimate grace we see in God becoming a man and going to the cross to pay for our sins. The horror of it can be seen by the Lord's anticipation of it in the Garden where he sweat (as it were) great drops of blood.
Consider the untold, unsearchable agony as He cried, "My God, My God, why have you forsaken me." The Lord laid on Him the iniquity of us all.
But we behold him who hath been made a little lower than the angels, even Jesus, because of the suffering of death crowned with glory and honor, that by the grace of God he should taste of death for every man.
Now all He demands of a man for a new birth & eternal life is that the man trust Him. Let Him be the Savior. Forsake the pride of claiming phony good works.
God; 9 who saved us, and called us with a holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before times eternal, 10 but hath now been manifested by the appearing of our Saviour Christ Jesus, who abolished death, and brought life and immortality to light through the gospel,
A shame on all the perverters of the gospel of grace:
I marvel that ye are so quickly removing from him that called you in the grace of Christ unto a different gospel; 7 which is not another gospel: only there are some that trouble you, and would pervert the gospel of Christ. 8 But though we, or an angel from heaven, should preach unto you any gospel other than that which we preached unto you, let him be anathema. 9 As we have said before, so say I now again, If any man preacheth unto you any gospel other than that which ye received, let him be anathema.
among whom we also all once lived in the lusts of our flesh, doing the desires of the flesh and of the mind, and were by nature children of wrath, even as the rest:— 4 but God, being rich in mercy, for his great love wherewith he loved us, 5 even when we were dead through our trespasses, made us alive together with Christ (by grace have ye been saved), 6 and raised us up with him, and made us to sit with him in the heavenly places, in Christ Jesus: 7 that in the ages to come he might show the exceeding riches of his grace in kindness toward us in Christ Jesus: 8 for by grace have ye been saved through faith; and that not of yourselves, it is the gift of God; 9 not of works, that no man should glory.
But if it is by grace, it is no more of works: otherwise grace is no more grace.