When he came to himself - A state of sin is represented in the sacred writings as a course of folly and madness; and repentance is represented as a restoration to sound sense. See this fully explained on Matthew 3:2 (note).

I perish with hunger! - Or, I perish Here. Ὡδε, here, is added by BDL, Syriac, all the Arabic and Persic, Coptic, Ethiopic, Gothic, Saxon, Vulgate, all the Itala, and several of the fathers.

when.

Luke 8:35 Then they went out to see what was done; and came to Jesus, and found the man, out of whom the devils were departed...

Luke 16:23 And in hell he lift up his eyes, being in torments, and sees Abraham afar off, and Lazarus in his bosom.

Psalm 73:20 As a dream when one wakes; so, O Lord, when you wake, you shall despise their image.

Ecclesiastes 9:3 This is an evil among all things that are done under the sun, that there is one event to all: yes...

Jeremiah 31:19 Surely after that I was turned, I repented; and after that I was instructed, I smote on my thigh: I was ashamed, yes, even confounded...

Ezekiel 18:28 Because he considers, and turns away from all his transgressions that he has committed, he shall surely live, he shall not die.

Acts 2:37 Now when they heard this, they were pricked in their heart, and said to Peter and to the rest of the apostles, Men and brothers...

Acts 16:29 Then he called for a light, and sprang in, and came trembling, and fell down before Paul and Silas,

Acts 16:30 And brought them out, and said, Sirs, what must I do to be saved?

Acts 26:11-19 And I punished them oft in every synagogue, and compelled them to blaspheme; and being exceedingly mad against them...

Ephesians 2:4,5 But God, who is rich in mercy, for his great love with which he loved us...

Ephesians 5:14 Why he said, Awake you that sleep, and arise from the dead, and Christ shall give you light.

Titus 3:4-6 But after that the kindness and love of God our Savior toward man appeared...

James 1:16-18 Do not err, my beloved brothers...

How.

Luke 15:18,19 I will arise and go to my father, and will say to him, Father, I have sinned against heaven, and before you...

Lamentations 1:7 Jerusalem remembered in the days of her affliction and of her miseries all her pleasant things that she had in the days of old...

The Prodigal and his Father
'And He said, A certain man had two sons: 12. And the younger of them said to his father, Father, give me the portion of goods that falleth to me. And he divided unto them his living. 13. And not many days after the younger son gathered all together, and took his journey into a far country, and there wasted his substance with riotous living. 14. And when he had spent all, there arose a mighty famine in that land; and he began to be in want. 15. And he went and joined himself to a citizen of that …
Alexander Maclaren—Expositions Of Holy Scripture

An Appeal to Sinners
Yours in much affection, C. H. S. "This man receiveth sinners."--Luke 15:2. IT WAS A SINGULAR GROUP which had gathered round our Saviour, when these words were uttered; for we are told by the evangelist--"Then drew near unto him all the publicans and sinners for to hear him." The publicans--the very lowest grade, the public oppressors, scorned and hated by the meanest Jew--these, together with the worst of characters, the scum of the streets and the very riff-raff of the society of Jerusalem, came …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 4: 1858

The Prodigal's Return
"When he was yet a great way off, his father saw him, and had compassion, and ran, and fell on his neck, and kissed him." First, I shall notice the position intended in the words, "a great way off ;" secondly, I shall notice the peculiar troubles which agitate the minds of those, who are in this condition; and then, thirdly, I shall endeavor to teach the great loving-kindness of our own adorable God, inasmuch as when we are "a great way off," he runs to us, and embraces us in the arms of his love. …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 4: 1858