6 All this Solomon perceived when he said, “It is better to go to the house of mourning than to the house of drinking.” From the one grows listlessness, from the other an earnest anxiety. From the one, contempt; from the other, fear; a fear which conducts us to the practice of every virtue. If fear were not a good thing, Christ would not have expended such long and frequent discourses on the subject of punishment, and vengeance to come. Fear is nothing less than a wall, and a defence, and an impregnable tower.
For indeed we stand in need of much defence, seeing that there are many ambushments on every side. Even as this same Solomon again says admonishingly, “Perceive that you go in the midst of snares, and that you walk on the battlements of cities.” Oh with how many good things is this saying pregnant! Yea, not less than the former! Let us then, write it, each of us, upon our minds, and carry it about ever in our memories, and we shall not easily commit sin. Let us write it there, having first learned it with the utmost exactness.
For he does not say, “Observe” that you go in the midst of snares; but, “Perceive!” And for what reason did he say, “Discern?” He tells us that the snare is concealed; for this is indeed a snare, when the destruction does not appear openly, and the injury is not manifest, which lies hidden on all sides. Therefore he says, “Perceive!” Thou needest much reflection and diligent scrutiny. For even as boys conceal traps with earth, so the devil covers up our sins with the pleasures of this life.
Source: Homilies on the Statues (New Advent)