What is repentance unto life?

Answer

Repentance unto life is a saving grace (), whereby a sinner, out of a true sense of his sin (), and apprehension of the mercy of God in Christ (; ), doth, with grief and hatred of his sin, turn from it unto God (; ), with full purpose of and endeavour after new obedience (; ).

Read the 8 proof texts (KJV)

Acts 11:18: When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Acts 2:37-38: ³⁷Now when they heard [this], they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men [and] brethren, what shall we do? ³⁸Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Joel 2:12: Therefore also now, saith the LORD, turn ye [even] to me with all your heart, and with fasting, and with weeping, and with mourning:
Jeremiah 3:22: Return, ye backsliding children, [and] I will heal your backslidings. Behold, we come unto thee; for thou [art] the LORD our God.
Jeremiah 31:18-19: ¹⁸I have surely heard Ephraim bemoaning himself [thus]; Thou hast chastised me, and I was chastised, as a bullock unaccustomed [to the yoke]: turn thou me, and I shall be turned; for thou [art] the LORD my God. ¹⁹Surely after that I was turned, I repented; and after that I was instructed, I smote upon [my] thigh: I was ashamed, yea, even confounded, because I did bear the reproach of my youth.
Ezekiel 36:31: Then shall ye remember your own evil ways, and your doings that [were] not good, and shall lothe yourselves in your own sight for your iniquities and for your abominations.
2 Corinthians 7:11: For behold this selfsame thing, that ye sorrowed after a godly sort, what carefulness it wrought in you, yea, [what] clearing of yourselves, yea, [what] indignation, yea, [what] fear, yea, [what] vehement desire, yea, [what] zeal, yea, [what] revenge! In all [things] ye have approved yourselves to be clear in this matter.
Isaiah 1:16-17: ¹⁶Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil; ¹⁷Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.