7 “And mighty men have sought after my soul.” For in a new manner, my brethren, they would destroy the race of holy men, and the race of them that abstain from hoping in this world, all they that have hope in this world. Certainly commingled they are, certainly together they live. Very much to one another are opposed these two sorts: the one of those that place no hope but in things secular, and in temporal felicity, and the other of those that do firmly place their hope in the Lord God.
And though concordant are these Ziphites, do not much trust to their concord: temptations are wanting; when there shall have come any temptation, so as that a person may be reproved for the flower of the world, I say not to you he will quarrel with the Bishop, but not even to the Church Herself will he draw near, lest there fall any part of the grass. Wherefore have I said these words, brethren? Because now gladly ye all hear in the name of Christ, and according as you understand, so ye shout out at the word; ye would not indeed shout at it unless ye understood. This your understanding ought to be fruitful.
But whether it is fruitful, temptation does try; lest suddenly when you are said to be ours, through temptation ye be found aliens, and it be said, “Aliens have risen up against me, and mighty men have sought my soul.” Be not that said which follows, “They have not set forth God before their face.” For when will he set God before his face, before whose eyes there is nought but the world? namely, how he may have coin upon coin, how flocks may be increased, how barns may be filled, how it may be said to his soul, “You have many good things, be merry, feast, take your fill.”
Does he set before his face Him, that unto one so boasting and so blooming with the flower of the Ziphites says, “Fool” (that is, “man not understanding,” “man unwise”), “this night shall be taken from you your soul; all these things which you have prepared, whose shall they be?”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)