I hate them with perfect hatred. Literally it is, I hate them with perfection of hatred. He repeats the same truth as formerly, that such was his esteem for God's glory that he would have nothing' in common with those who despised him. He means in general that he gave no countenance to the works of darkness, for whoever connives at sin and encourages it through silence, wickedly betrays God's cause, who has committed the vindication of righteousness into our hands. David's example should teach us to rise with a lofty and bold spirit above all regard to the enmity of the wicked, when the question concerns the honor of God, and rather to renounce all earthly friendships than falsely pander with flattery to the favor of those who do everything to draw down upon themselves the divine displeasure. We have the more need to attend to this, because the keen sense we have of what concerns our private interest, honor, and convenience, makes us never hesitate to engage in contest when any one injures ourselves, while we are abundantly timid and cowardly in defending the glory of God. Thus, as each of us studies his own interest and advantage, the only thing which incites us to contention, strife, and war, is a desire to avenge our private wrongs; none is affected when the majesty of God is outraged. On the other hand, it is a proof of our having a fervent zeal for God when we have the magnanimity to declare irreconcilable war with the wicked and them who hate God, rather than court their favor at the expense of alienating the divine layout. We are to observe, however, that the hatred of which the Psalmist speaks is directed to the sins rather than the persons of the wicked. We are, so far as lies in us, to study peace with all men; we are to seek the good of all, and, if possible, they are to be reclaimed by kindness and good offices: only so far as they are enemies to God we must strenuously confront their resentment.

I hate them with perfect hatred - With no approval whatever of their conduct; with no sympathy for the evil they do; with no words of apology for their sinful acts; with entire disapprobation.
I count them mine enemies - As they are the enemies of God, so I regard them as my enemies. I do not wish to be associated with them, or to be regarded as one of them.

With perfect hatred - Their conduct, their motives, their opposition to thee, their perfidy and idolatrous purposes, I perfectly abhor. With them I have neither part, interest, nor affection.

I hate them with perfect hatred,.... Heartily and really; not in word only, but in deed and in truth; "odio vatiniano", with consummate hatred: this is an answer to his own question;
I count them mine enemies; being the enemies of God: the friends of God were David's friends, as angels and good men, and God's enemies were his; their friends and enemies, were common; so closely allied and attached were they to each other, as God and all good men are.

Perfect hatred - See the difference between the Jewish and the Christian spirit!