19 But it may also be thus understood, that we who have renounced the world, and have cast away its riches and pomps in the faith of spiritual grace, should only ask for ourselves food and support, since the Lord instructs us, and says, “Whosoever forsakes not all that he has, cannot be my disciple.” But he who has begun to be Christ's disciple, renouncing all things according to the word of his Master, ought to ask for his daily food, and not to extend the desires of his petition to a long period, as the Lord again prescribes, and says, “Take no thought for the morrow, for the morrow itself shall take thought for itself.
Sufficient for the day is the evil thereof.” With reason, then, does Christ's disciple ask food for himself for the day, since he is prohibited from thinking of the morrow; because it becomes a contradiction and a repugnant thing for us to seek to live long in this world, since we ask that the kingdom of God should come quickly. Thus also the blessed apostle admonishes us, giving substance and strength to the steadfastness of our hope and faith: “We brought nothing,” says he, “into this world, nor indeed can we carry anything out.
Having therefore food and raiment, let us be herewith content. But they that will be rich fall into temptation and a snare, and into many and hurtful lusts, which drown men in perdition and destruction. For the love of money is the root of all evil; which while some coveted after, they have made shipwreck from the faith, and have pierced themselves through with many sorrows.”
Source: The Treatises of Cyprian (New Advent)