I will arise and go to my father, and will say unto him, Father, I have sinned against {b} heaven, and before thee,

(b) Against God, because he is said to dwell in heaven.

People's New Testament

15:18 I will arise and go. This resolve is repentance, the change of purpose and heart. He is led to it by his sense of need, the burden of sin.

Father, I have sinned. His change of heart, or repentance, must be followed by confession.

Wesley's Notes

15:18 I will arise and go to my father - How accurately are the first steps of true repentance here pointed out! Against Heaven - Against God.

Scofield Reference Notes

Margin sinned

Sin. See Scofield Note: "Rom 3:23".

Jamieson-Fausset-Brown Bible Commentary

18. I will arise and go to my FATHER-The change has come at last, and what a change!-couched in terms of such exquisite simplicity and power as if expressly framed for all heart-broken penitents.

Father, &c.-Mark the term. Though "no more worthy to be called his son," the prodigal sinner is taught to claim the defiled, but still existing relationship, asking not to be made a servant, but remaining a son to be made "as a servant," willing to take the lowest place and do the meanest work. Ah! and is it come to this? Once it was, "Any place rather than home." Now, "Oh, that home! Could I but dare to hope that the door of it would not be closed against me, how gladly would I take any place and do any worK, happy only to be there at all." Well, that is conversion-nothing absolutely new, yet all new; old familiar things seen in a new light and for the first time as realities of overwhelming magnitude and power. How this is brought about the parable says not. (We have that abundantly elsewhere, Php 2:13, &c.). Its one object is to paint the welcome home of the greatest sinners, when (no matter for the present how) they "arise and go to their Father."

Matthew Henry's Concise Commentary

15:17-24 Having viewed the prodigal in his abject state of misery, we are next to consider his recovery from it. This begins by his coming to himself. That is a turning point in the sinner's conversion. The Lord opens his eyes, and convinces him of sin; then he views himself and every object, in a different light from what he did before. Thus the convinced sinner perceives that the meanest servant of God is happier than he is. To look unto God as a Father, and our Father, will be of great use in our repentance and return to him. The prodigal arose, nor stopped till he reached his home. Thus the repenting sinner resolutely quits the bondage of Satan and his lusts, and returns to God by prayer, notwithstanding fears and discouragements. The Lord meets him with unexpected tokens of his forgiving love. Again; the reception of the humbled sinner is like that of the prodigal. He is clothed in the robe of the Redeemer's righteousness, made partaker of the Spirit of adoption, prepared by peace of conscience and gospel grace to walk in the ways of holiness, and feasted with Divine consolations. Principles of grace and holiness are wrought in him, to do, as well as to will.