Sanctification is not a work of nature, but a work of grace. It is a transformation of character effected not by moral influences, but supernaturally by the Holy Spirit.
Charles HodgeNo more soul-destroying doctrine could well be devised than the doctrine that sinners can regenerate themselves, and repent and believe just when they please...As it is a truth both of Scripture and of experience that the unrenewed man can do nothing of himself to secure his salvation, it is essential that he should be brought to practical conviction of that truth. When thus convinced, and not before, he seeks help from the only source whence it can be obtained.
Charles HodgeHe [man] knows that when he is not what he ought to be; when he does what he ought not to do; or omits what he ought to do, he is chargeable with sin
Charles HodgePrayer is the converse of the soul with God. Therein we manifest or express to Him our reverence, and love for His divine perfection, our gratitude for all His mercies, our penitence for our sins, our hope in His forgiving love, our submission to His authority, our confidence in His care, our desires for His favour, and for the providential and spiritual blessings needed for ourselves and others.
Charles Hodge