9 We will give him other sights in exchange for such sights as these. And what sights shall we present to the Christian, whom we would fain divert from those sights? I thank the Lord our God; He in the following verse of the Psalm has shown us what sights we ought to present and offer to spectators who would fain have sights to see? Let us now suppose him to be weaned from the circus, the theatre, the amphitheatre; let him be looking after, let him by all means be looking after, some sight to see; we do not leave him without a spectacle. What then shall we give in exchange for those? Hear what follows.
“Many, O Lord my God, are the wonderful works which You have made”. He used to gaze at the “wonderful works” of man; let him now contemplate the wonderful works of God. “Many are the wonderful works” that God “has made.” Why are they become vile in his eyes? He praises the charioteer guiding four horses; running all of them without fault and without stumbling. Perhaps the Lord has not made such “wonderful works” in things spiritual. Let him control lust, let him control cowardice, let him control injustice, let him control imprudence, I mean, the passions which falling into excess produce those vices; let him control these and bring them into subjection, and let him hold the reins, and not suffer himself to be carried away; let him guide them the way he himself would have them go; let him not be forced away whither he would not. He used to applaud the charioteer, he himself shall be applauded for his own charioteering; he used to call out that the charioteer should be invested with a dress of honour; he shall himself be clothed with immortality. These are the spectacles, these the sights that God exhibits to us. He cries out of heaven, “My eyes are upon you. Strive, and 'I will?' assist you; triumph, and I will crown you.”
“And in Your thought there is none that is like You.” Now then look at the actor! For the man has by dint of great pains learned to walk upon a rope; and hanging there he holds you hanging in suspense. Turn to Him who exhibits spectacles far more wonderful. This man has learned to walk upon the rope; but has he caused another to walk on the sea? Forget now your theatre; behold our Peter; not a walker on the rope, but, so to speak, a walker on the sea. And do thou also walk on other waters (though not on those on which Peter walked, to symbolize a certain truth), for this world is a sea. It has a deleterious bitterness; it has the waves of tribulations, the tempests of temptations; it has men in it who, like fish, delight in their own ruin, and prey upon each other; walk thou here, set thou your foot on this. You would see sights; be yourself a “spectacle.” That your spirit may not sink, look on Him who goes before you, and says, “We have been made a spectacle unto this world, and unto angels, and unto men.” Tread thou on the waters; suffer not yourself to be drowned in the sea. You will not go there, you will not “tread it under foot,” unless it be His bidding, who was Himself the first to walk upon the sea. For it was thus that Peter spoke. “If You are, bid me come unto You on the waters.” And because “He was,” He heard him when praying; He granted his wish to him when expressing his desire; He raised him up when sinking. These are the “wonderful works” that the “Lord has made.” Look on them; let faith be the eye of him who would behold them. And do thou also likewise; for although the winds alarm you, though the waves rage against you, and though human frailty may have inspired you with some doubt of your salvation, you have it in your power to “cry out,” you may say “Lord, I perish.” He who bids you walk there, suffers you not to perish. For in that thou now walkest “on the Rock,” you fear not even on the sea! If you are without “the Rock,” you must sink in the sea; for the Rock on which you must walk is such an one as is not sunk in the sea,
Source: The Enarrations, or Expositions, on the Psalms (New Advent)