11 After this there is a return to the Person of God, to Whom the petition was at the first addressed: Destroy them by Your truth. Truth confounds falsehood, and lying is destroyed by truth. We have shown that the whole of the foregoing prayer is the utterance of that human nature in which the Son of God was born; so here it is the voice of human nature calling upon God the Father to destroy His enemies in His truth. What this truth is, stands beyond doubt; it is of course He Who said: I am the Life, the Way, the Truth. And the enemies were destroyed by the truth when, for all their attempts to win Christ's condemnation by false witness, they heard that He was risen from the dead and had to admit that He had resumed His glory in all the reality of Godhead. Ere long they found, in ruin and destruction by famine and war, their reward for crucifying God; for they condemned the Lord of Life to death, and paid no heed to God's truth displayed in Him through His glorious works. And thus the Truth of God destroyed them when He rose again to resume the majesty of His Father's Glory, and gave proof of the truth of that perfect Divinity which He possessed.
Source: Homilies on the Psalms (New Advent)