11 “For I have seen iniquity and contradiction in the city.” With reason this man was seeking the desert, for he saw iniquity and contradiction in the city. There is a certain city turbulent: the same it was that was building a tower, the same was confounded and called Babylon, the same through innumerable nations dispersed: thence is gathered the Church into the desert of a good conscience. For he saw contradiction in the city. “Christ comes.”— “What Christ?” you contradict— “Son of God.”— “And has God a Son?” you contradict— “He was born of a virgin, suffered, rose again.”— “And whence is it possible for this to be done?” you contradict.— Give heed at least to the glory of the Cross itself.
Now on the brow of kings that Cross has been fixed, over which enemies insulted. The effect has proved the virtue. It has subdued the world, not with steel, but with wood. The wood of the Cross deserving of insults has seemed to enemies, and before the wood itself standing they were wagging the head, and saying, “If Son of God He is, let Him come down from the Cross.” He was stretching forth His hands to a people unbelieving and contradicting. For if just he is that of faith lives, unjust he is that has not faith.
By that which here he says “iniquity,” I understand unbelief. The Lord therefore was seeing in the city iniquity and contradiction, and was stretching forth His hands to a people unbelieving and contradicting: and nevertheless waiting for these same, He was saying, “Father, forgive them, for they know not what they do.” Even now indeed there rage the remnant of that city, even now they contradict. From the brows of all men now He is stretching forth hands to the remnant unbelieving and contradicting.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)