
John Chrysostom
Catena Aurea · Matthäusevangelium 6
Therefore when thou doest thine alms, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, that they may have glory of men. Verily I say unto you, They have their reward. But when thou doest alms, let not thy left hand know what thy right hand doeth: That thine alms may be in secret: and thy Father which seeth in secret Himself shall reward thee openly.
Let not thy left hand know what thy right hand doeth, is said as an extreme expression, as much as to say, If it were possible, that you should not know yourself, and that your very hands should be hid from your sight, that is what you should most strive after.