Verse 2. - I will behave myself wisely in a perfect way (comp. Psalm 18:22; Isaiah 26:7). The psalmist aspires after "perfectness." Then feeling his inability to walk in the perfect way by his own strength, he cries to God for aid - O when wilt thou come unto me? "Unless," i.e., "thou come unto me, I cannot keep one of these resolutions. O Lord, come quickly." I will walk within my house with a perfect heart. It is not only the "way," or conduct, that requires to be "perfect," but the "heart" also, or the motives from which the conduct springs.

Verse 3. - I will set no wicked thing before mine eyes; or, no base thing (Revised Version); "no villainous thing" (Cheyne, Kay); comp. Deuteronomy 15:9. I will set before me nothing of this kind, "as an object either of imitation or of attainment." I hate the work of them that turn aside; literally, the doing of acts that swerve; i.e. "that depart from the right way." It shall not cleave to me. If such a thing "seized on him unawares, he would shake it off as a thing accursed" (Kay); comp. Deuteronomy 13:17.

Verse 4. - A froward heart shall depart from me; i.e. I will put away from me all perversity of heart; I will root it out and rid myself of it. I will not know a wicked person. This is a possible meaning, but it is better to translate, with our Revisers, "I will know no evil thing." The "principles of private conduct" may be summed up under the four heads of

(1) devotion;

(2) endeavour after perfectness;

(3) avoidance of evil;

(4) hatred of it.

Verse 5. - Whoso privily slandereth his neighbour, him will I out off. (On the heinousness of slander, see Psalm 15:3; Psalm 31:13; Psalm 50:20, etc.) It is probably not meant that the slanderer will be put to death, but only that he will be banished, at any rate from the court, and, so far as possible, put down. Him that hath an high look and a proud heart will not I suffer. "Lofty looks" and a "proud heart" are again conjoined in Proverbs 21:4, Solomon showing that he paid attention to his father's lessons. David himself disclaims both in Psalm 131:1.

Verse 6. - Mine eyes shall be upon the faithful of the land; i.e. "my favour shall be shown to them; I will give them help and encouragement." That they may dwell with me; i.e. "frequent my court," either as officials or as simple courtiers. He that walketh in a perfect way (see the comment on ver. 2). He shall serve me; i.e. "shall be promoted to office under my government."

Verse 7. - He that worketh deceit shall not dwell within my house. It is the duty of a king to see, not only that his own ways are blameless, but that his entire household is well ordered, and consists of righteous persons (comp. Job 1:5). "Deceit" here means "wickedness" generally. He that telleth lies shall not tarry in my sight; literally, shall not be established; i.e. shall not keep his position in my court, but be banished from it. "Lying" is one of the sins which the psalmists denounce most frequently (see Psalm 31:18; Psalm 40:4; Psalm 52:3; Psalm 58:3; Psalm 59:12; Psalm 62:4; Psalm 63:11; Psalm 119:163, etc.).

Verse 8. - I will early destroy all the wicked of the land; literally, each morn will I root out all the wicked of the land; i.e. "day after day I will make it my endeavour, not only to keep my palace free from evil doers, but to cleanse the whole land of them." David is determined to exercise that just severity which is a part of the duty of kings (Romans 13:4), and not to be that curse to a country - a weak and over-indulgent ruler (see Calvin, ad loc.). That I may cut off all wicked doers from the city of the Lord. So long as there were "wicked doers" in the land, they would be sure to flock to Jerusalem, since the capital always attracts the criminal classes. David is especially anxious that Jerusalem, which he has made "the city of the Lord" (2 Samuel 6:12-19), shall be kept free from the pollutions of evil doers, but, to effect this object, he must purge the whole land. The spirit breathed is that of Psalm 15:1-5.