2 Here then it is further required, that each of you be found faithful in his conscience: for a faithful man it is hard to find: not that you should show your conscience to me, for you are not to be judged of man's judgment; but that thou show the sincerity of your faith to God, who tries the reins and hearts, and knows the thoughts of men. A great thing is a faithful man, being richest of all rich men. For to the faithful man belongs the whole world of wealth, in that he disdains and tramples on it. For they who in appearance are rich, and have many possessions, are poor in soul: since the more they gather, the more they pine with longing for what is still lacking. But the faithful man, most strange paradox, in poverty is rich: for knowing that we need only to have food and raiment, and being therewith content, he has trodden riches under foot.
Source: Catechetical Lectures (New Advent)