What is repentance unto life?

Repentance unto life is a saving grace¹⁸⁰, whereby a sinner, out of a true sense of his sin, and apprehension of the mercy of God in Christ¹⁸¹, doth, with grief and hatred of his sin, turn from it unto God¹⁸², with full purpose of, and endeavor after, new obedience¹⁸³.