Except they have done mischief - The night is their time for spoil and depredation. And they must gain some booty, before they go to rest. This I believe to be the meaning of the passage. I grant, also, that there may be some of so malevolent a disposition that they cannot be easy unless they can injure others, and are put to excessive pain when they perceive any man in prosperity, or receiving a kindness. The address in Virgil, to an illnatured shepherd is well known: -
Et cum vidisti puero donata, dolebas:
Et si non aliqua nocuisses, mortuus esses.
Eclog. 3: 14.
"When thou sawest the gifts given to the lad, thou wast distressed; and hadst thou not found some means of doing him a mischief, thou hadst died."
The counsel which has come to him, in substance, from his father. Compare it with 2 Samuel 23:2 etc.; 1 Chronicles 28:9; 1 Chronicles 29:17; Psalm 15:1-5; Psalm 24:1-10; Proverbs 4:7
Or, “The beginning of wisdom is - get wisdom.” To seek is to find, to desire is to obtain.
Proverbs 4:12
The ever-recurring parable of the journey of life. In the way of wisdom the path is clear and open, obstacles disappear; in the quickest activity (“when thou runnest”) there is no risk of falling.
Proverbs 4:13
She is thy life - Another parallel between personified Wisdom in this book and the Incarnate Wisdom in John 1:4.
Proverbs 4:16
A fearful stage of debasement. Sin is the condition without which there can be no repose.
Proverbs 4:17
i. e., Bread and wine gained by unjust deeds. Compare Amos 2:8. A less probable interpretation is, “They eat wickedness as bread, and drink violence as wine.” Compare Job 15:16; Job 34:7.
Proverbs 4:18
Shining shineth - The two Hebrew words are different; the first having the sense of bright or clear. The beauty of a cloudless sunshine growing on, shining as it goes, to the full and perfect day, is chosen as the fittest figure of the ever increasing brightness of the good man‘s life. Compare the marginal reference.
Proverbs 4:19
Compare our Lord‘s teaching John 11:10; John 12:35.
Proverbs 4:20
The teacher speaks again in his own person.