Behold! these are the ungodly. The Psalmist here shows, as it were by a vivid pictorial representation, the character of that envy which had well nigh overthrown him. Behold! says he, these are wicked men! and yet they happily enjoy their ease and pleasures undisturbed, and are exalted to power and influence; and that not merely for a few days, but their prosperity is of long duration, and has, as it were, an endless course. And is there anything which seems to our judgment less reasonable than that persons whose wickedness is accounted infamous and detestable, even in the eyes of men, should be treated with such liberality and indulgence by God? Some here take the Hebrew word vlm, olam, for the world, but improperly. It rather denotes in this passage an age; and what David complains of is, that the prosperity of the wicked is stable and of long duration, and that to see it last so long wears out the patience of the righteous. Upon seeing the wicked so tenderly cherished by God, he descends to the consideration of his own case; and as his conscience bore him testimony that he had walked sincerely and uprightly, he reasons with himself as to what advantage he had derived from studiously devoting himself to the practice of righteousness, since he was afflicted and harassed in a very unusual degree. He tells us that he was scourged daily, and that as often as the sun rose, some affliction or other was prepared for him, so that there was no end to his calamities. In short the amount of his reasoning is this, "Truly I have labored in vain to obtain and preserve a pure heart and clean hands, seeing continued afflictions await me, and, so to speak, are on the watch to meet me at break of day. Such a condition surely shows that there is no reward for innocence before God, else he would certainly deal somewhat more compassionately towards those who serve him." As the true holiness for which the godly are distinguished consists of two parts, first, of purity of heart, and, secondly, of righteousness in the outward conduct, David attributes both to himself. Let us learn, from his example, to join them together: let us, in the first place, begin with purity of heart, and then let us give evidence of this before men by uprightness and integrity in our conduct.

Behold, these are the ungodly, who prosper in the world - This is also to be understood as the language of the good man perplexed and embarrassed by the fact that the wicked are prosperous and happy. The meaning is, "Lo, these are wicked people - people of undoubted depravity; they are people who live regardless of God; and yet they are peaceful, tranquil, happy, prospered." This was one of the facts which so much embarrassed the psalmist. If there had been any doubt about the character of those people, the case would have been different. But there was none. They were people whose character for wickedness was well known, and yet they were permitted to live in peace and prosperity, as if they were the favorites of heaven. The literal meaning of the words rendered "who prosper in the world" is, "tranquil (or secure) for the age;" that is, forever, or constantly. They know no changes; they see no reverses; they are the same through life. They are always tranquil, calm, happy, successful.
They increase in riches - literally, "They become great in substance." They make constant accumulations in wealth, until they become great.

These are the ungodly - The people still speak. It is the ungodly that prosper, the irreligious and profane.

Behold, these are the ungodly,.... Who say and do as before declared; such as these must be without the knowledge of God, the fear, love, and worship of him: who prosper in the world; in worldly and temporal things, in their bodies and outward estates, but not in their souls and spiritual things: "in this world", as the Targum is; all their prosperity is here; their good things are in this life, their evil things will be in that to come; though ungodly, they prosper in the world, and as long as they are in it; or they are at peace and in case, and are quiet; they have nothing to disturb them, they are not in outward trouble, and their sins do not distress them, and they have no concern about another world:
they increase in riches; which they are in the pursuit of, and overtake and enjoy in great abundance; whereby they become mighty and powerful, as the word (o) for "riches" signifies: these words are the observation of the psalmist, and which was the occasion of the following temptation he was led into.
(o) "vires", Junius & Tremellius; "potentiam", Piscator.

prosper in the word--literally, "secure for ever."

Behold - These seem to be the words of the psalmist, summing up the matter.