6 All these very people, over whom You are great in Sion, “Let them confess unto Your Name, which is great”. Your Name was little when they were enraged: it has become great; let them now confess. In what sense do we say, that the Name of Christ was little, before it was spread abroad to so great an extent? Because His report is meant by His Name. His Name was small; already it has become great. What nation is there that has not heard of the Name of Christ? Therefore let now the people confess unto Your Name, which is great, who before were enraged with Your little Name.
Wherefore shall they confess? Because it is “wonderful and holy.” Your very Name is wonderful and holy. He is so preached as crucified, so preached as humbled, so preached as judged, that He may come exalted, that He may come living, that He may come to judge in power. He spares at present the people who blaspheme Him, because “the long-suffering of God leads to repentance.” For He who now spares, will not always spare: nor will He, who is now being preached that He may be feared, fail to come to judge.
He will come, my brethren, He will come: let us fear Him, and let us live so that we may be found on His right hand. For He will come, and will judge, so as to place some on the left hand, some on the right. And He does not act in an uncertain manner, so as to err perchance between men, so that he who should be set on the right hand, be set on the left; or that he who ought to stand on the left, by a mistake of God should stand on the right: He cannot err, so as to place the evil where He ought to set the good; nor to place the good, where He should have set the evil. If He cannot err, we err, if we fear not; but if we have feared in this life, we shall not then have what to fear for. “For the King's honour loves judgment.”...
Source: The Enarrations, or Expositions, on the Psalms (New Advent)