5 But if you can not bear, upon hearing so high words, to release yourself from these grievous bonds, consider the unprofitableness of the thing, and so put an end to your care. For
“Which of you by taking thought” (says He) “can add one cubit unto his stature.”
Do you see how by that which is evident, He has manifested that also which is obscure? Thus, “As unto your body,” says He, “you will not by taking thought be able to add, though it be ever so little; so neither to gather food; think as you may otherwise.” Hence it is clear that not our diligence, but the providence of God, even where we seem to be active, effects all. So that, were He to forsake us, no care, nor anxiety, nor toil, nor any other such thing, will ever appear to come to anything, but all will utterly pass away.
Let us not therefore suppose His injunctions are impossible: for there are many who duly perform them, even as it is. And if you know not of them, it is nothing marvellous, since Elias too supposed he was alone, but was told, “I have left unto myself seven thousand men.” Whence it is manifest that even now there are many who show forth the life; like as the “three thousand” then, and the “five thousand.” And if we believe not, it is not because there are none who do well, but because we are far from so doing. So that just as the drunkard would not easily believe, that there exists any man who does not taste even water (and yet this has been achieved by many solitaries in our time); nor he who connects himself with numberless women, that it is easy to live in virginity; nor he that extorts other men's goods, that one shall readily give up even his own: so neither will those, who daily melt themselves down with innumerable anxieties, easily receive this thing.
Now as to the fact, that there are many who have attained unto this, we might show it even from those, who have practised this self-denial even in our generation.
But for you, just now, it is enough to learn not to covet, and that almsgiving is a good thing; and to know that you must impart of what you have. For these things if you will duly perform, beloved, you will speedily proceed to those others also.
Source: Homilies on the Gospel of St. Matthew (New Advent)