The whole of the devout man's desires for himself are summed up in that prayer for guidance. All which the soul needs is included in these two: access to God in the depths of still prostration before His throne as the all-sufficient good for the inner life; guidance, as by a shepherd, on a plain path, chosen not by self-will but by God, for the outward. He who has received the former in any degree will in the same measure have the latter. To dwell in God's house is to desire His guidance as the chief good. "In Thy righteousness" is capable of two meanings: it may either designate the path by which the psalmist desired to be led, or the Divine attribute to which he appealed. The latter meaning, which is substantially equivalent to "because Thou art righteous," is made more probable by the other instances in the psalm of a similar use of "in" (_in the multitude of Thy mercy_; _in Thy fear_; _in the multitude of their transgressions_). His righteousness is manifested in leading those who seek for His guidance (compare Psalm xxv. 8; xxxi. 1, etc.). Then comes the only trace in the psalm of the presence of enemies, because of whom the singer prays for guidance. It is not so much that he fears falling into their hands as that he dreads lest, if left to himself, he may take some step which will give them occasion for malicious joy in his fall or his calamity. Wherever a man is earnestly God-fearing, many eyes watch him, and gleam with base delight if they see him stumble. The psalmist, whether David or another, had that cross to carry, like every thorough-going adherent of the religious ideal (or of any lofty ideal, for that matter); and his prayer shows how heavy it was, since thoughts of it mingled with even his longings for righteousness. "Plain" does not mean _obvious_, but _level_, and may possibly include both freedom from stumbling-blocks ("Lead us not into temptation") and from calamities, but the prevalent tone of the psalm points rather to the former. He who knows his own weaknesses may legitimately shrink from snares and occasions to fall, even though, knowing the wisdom of his Guide and the help that waits on his steps, he may "count it all joy" when he encounters them.
The picture of the evil-doers in ver. 9 is introduced, as in ver. 4, with a "for." The sinners here are evidently the _enemies_ of the previous verse. Their sins are those of speech; and the force of the rapid clauses of the picture betrays how recently and sorely the psalmist had smarted from lies, flatteries, slanders, and all the rest of the weapons of smooth and bitter tongues. He complains that there is no faithfulness or steadfastness in "his mouth"--a distributive singular, which immediately passes into the plural--nothing there that a man can rely on, but all treacherous. "Their inward part is destruction." The other rendering, "engulfing ruin" or "a yawning gulf," is picturesque; but _destruction_ is more commonly the meaning of the word and yields a vigorous sense here. They plot inwardly the ruin of the men whom they flatter. The figure is bold. Down to this pit of destruction is a way like an open sepulchre, the throat expanded in the act of speech; and the falsely smoothed tongue is like a slippery approach to the descent (so Jennings and Lowe). Such figures strike Western minds as violent, but are natural to the East. The shuddering sense of the deadly power of words is a marked characteristic of the Psalter. Nothing stirs psalmists to deeper indignation than "God's great gift of speech abused," and this generation would be all the better for relearning the lesson.
The psalmist is "in the sanctuary," and there "understands their end," and breaks into prayer which is also prophecy. The vindication of such prayers for the destruction of evil-doers is that they are not the expressions of personal enmity ("They have rebelled against Thee"), and that they correspond to one side of the Divine character and acts, which was prominent in the Old Testament epoch of revelation, and is not superseded by the New. But they do belong to that lower level; and to hesitate to admit their imperfection from the Christian point of view is to neglect the plain teaching of our Lord, who built His law of the kingdom on the declared relative imperfection of the ethics of the Old. Terrible indeed are the prayers here. _Hold them guilty_--that is, probably, treat them as such by punishing; _let them fall_; _thrust them out_--from Thy presence, if they have ventured thither, or out into the darkness of death. Let us be thankful that we dare not pray such prayers, but let us not forget that for the psalmist not to have prayed them would have indicated, not that he had anticipated the tenderness of the Gospel, but that he had failed to learn the lesson of the law and was basely tolerant of baseness.