2 What are we to do then? Let us be seconded by your pious attention, so that we may discern the purpose of God in these verses of the Psalm, what it is He would have us understand by them. For there is a fear, lest any unstable person, not capable of understanding the Scriptures spiritually, should appeal to human instances, and should observe the virtuous servants of God to be sometimes in some necessity, and in want, so as to be compelled to beg bread: should particularly call to mind the Apostle Paul, who says, “In hunger and thirst; in cold and nakedness;” and should stumble thereat, saying to himself, “Is that certainly true which I have been singing?
Is that certainly true, which I have been sounding forth in so devout a voice, standing in church? 'I have never seen the righteous forsaken, nor his seed begging bread.'” Lest he should say in his heart, “Scripture deceives us;” and all his limbs should be paralyzed to good works: and when those limbs within him, those limbs of the inner man, shall have been paralyzed (which is the more fearful paralysis), he should henceforth leave off from good works, and say to himself, “Wherefore do I do good works?
Wherefore do I break my bread to the hungry, and clothe the naked, and take home to mine house him who has no shelter, putting faith in that which is written? 'I have never seen the righteous forsaken, nor his seed begging bread;' whereas I see so many persons who live virtuously, yet for the most part suffering from hunger. But if perhaps I am in error in thinking the man who is living well, and the man who is living ill, to be both of them living well, and if God knows him to be otherwise; that is, knows him, whom I think just, to be unjust, what am I to make of Abraham's case, who is commended by Scripture itself as a righteous person?
What am I to make of the Apostle Paul, who says, 'Be followers of me, even as I also am of Christ.' What? That I should myself be in evils such as he endured, 'In hunger and thirst, in cold and nakedness'?”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)