Pseudo-Chrysostom
Catena Aurea · Matthäusevangelium 6
Take heed that ye do not your alms before men, to be seen of them: otherwise ye have no reward of your Father which is in Heaven.
And therefore he enjoins this to be more carefully avoided, Take heed that ye do not your righteousness before men. It is our heart we must watch, for it is an invisible serpent that we have to guard against, which secretly enters in and seduces; but if the heart be pure into which the enemy has succeeded in entering in, the righteous man soon feels that he is prompted by a strange spirit; but if his heart were full of wickednesses, he does not readily perceive the suggestion of the Devil, and therefore He first taught us, Be not angry, Lust not, for that he who is under the yoke of these evils cannot attend to his own heart. But how can it be that we should not do our alms before men. Or if this may be, how can they be so done that we should not know of it. For if a poor man come before us in the presence of any one, how shall we be able to give him alms in secret? If we lead him aside, it must be seen that we shall give him. Observe then that He said not simply, Do not before men, but added, to be seen of them. He then who does righteousness not from this motive, even if he does it before the eyes of men, is not to bethought to be herein condemned; for he who does any thing for God’s sake, sees nothing in his heart but God, for whose sake he does it; as a workman has always before his eyes him who has entrusted him with the work to do.