If then we seek the fame of giving, we make even our public deeds to be hidden in His sight; for if herein we seek our own glory, then they are already cast out of His sight, even though there be many by whom they are yet unknown. It belongs only to the thoroughly perfect, to suffer their deeds to be seen, and to receive the praise of doing them in such sort that they are lifted up with no secret exultation; whereas they that are weak, because they cannot attain to this perfect contempt of their own fame, must needs hide those good deeds that they do.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Mor., viii, 48