(3, 4) From the secret promptings of sin, the description of the ungodly passes on to its issues in words and deeds. It is an awful picture of wickedness of a man abandoning himself without check or remorse to the inspiration of his own evil heart. He goes from bad to worse. In a great English tragedy, the murderer, though he has determined to wade farther in blood, yet prays against the horror of nightly temptations:

"Merciful powers,

Restrain in me the cursed thoughts that nature

Gives way to in repose.

But this man "deviseth mischief upon his bed." When even the worst criminals shudder at their own deeds, whispering to their "deaf pillows" the agonies that creep over them with darkness and silence, this ungodly man of the Hebrew poet's picture is occupied rather in scheming fresh villainies; even then he abhorreth not evil, or better, rejecteth not, catches rather at every fresh suggestion, and shapes it to his end.

Verse 3. - The words of his mouth are iniquity and deceit (comp. Psalm 12:2; Psalm 28:3). He hath left off to be wise, and to do good. There was a time when he occasionally acted wisely, and did what was right. But that time is gone by. Now he is consistently wicked.

36:1-4 From this psalm our hearts should be duly affected with hatred of sin, and seek satisfaction in God's loving-kindness. Here is the root of bitterness, from which all the wickedness of wicked men comes. It takes rise from contempt of God, and the want of due regard to him. Also from the deceit they put upon their own souls. Let us daily beg of God to preserve us from self-flattery. Sin is very hurtful to the sinner himself, and therefore ought to be hateful; but it is not so. It is no marvel, if those that deceive themselves, seek to deceive all mankind; to whom will they be true, who are false to their own souls? It is bad to do mischief, but worse to devise it, to do it with plot and management. If we willingly banish holy meditations in our solitary hours, Satan will soon occupy our minds with sinful imaginations. Hardened sinners stand to what they have done, as though they could justify it before God himself.The words of his mouth are iniquity and deceit,.... Not only sinful, but sin itself; his mouth is full of cursing and bitterness, of filthy and unchaste words, of corrupt communication, lying, deceit, and flattery; out of the abundance of the wickedness of his heart his mouth speaketh; and which shows the badness of it, and proves all that is said before of him;

he hath left off to be wise, and to do good; by which the psalmist seems to intend one that had been a professor of religion, who, besides the light of nature he had acted contrary to, had had the advantage of a divine revelation, and had been enlightened into the knowledge of divine things, and had done many things externally good, particularly acts of beneficence; but now had dropped his profession of religion, denied the truths he had been enlightened into, and ceased from doing good; otherwise a natural man understandeth not; and, though he is wise to do evil, to do good he has no knowledge.