6 “Our soul is filled exceedingly; a reproach to the wealthy, and a contempt to the proud”. We were asking who were “the wealthy:” he has expounded to you, in that he has said, “the proud.” “Reproach” and “contempt” are the same: and “wealthy” is the same with “proud.” It is a repetition of the sentence, “a reproach to the wealthy, and a contempt to the proud.” Why are the proud wealthy? Because they wish to be happy here. Why? Since they themselves too are miserable, are they wealthy?
But perhaps when they are miserable, they do not mock us. Listen, my beloved. Then perchance they mock when they are happy, when they boast themselves in the pomp of their riches! When they boast themselves in the inflated state of false honours: then they mock us, and seem to say, Behold, it is well with me: I enjoy the good things before me: let those who promise what they cannot show depart from me: what I see, I hold; what I see, I enjoy; may I fare well in this life. Be thou more secure; for Christ has risen again, and has taught you what He will give in another life: be assured that He gives it.
But that man mocks you, because he holds what he has. Bear with his mockeries, and you will laugh at his groans: for afterwards there will come a season when these very persons will say, “This was he whom we had sometimes in derision.”...
Source: The Enarrations, or Expositions, on the Psalms (New Advent)