The Lord says to His disciples, 'Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven' (Matt. 5:16). He does not say this to urge them to show off, but to urge them to organize their lives as is pleasing to God. Just as light effortlessly attracts people's gaze, so a way of life pleasing to God draws their minds along with their eyes. We do not praise the air which shares in the brilliance of the sunlight, but the sun which is the source of this brilliance and bestows it on us. Even if we do praise the air for its brightness, we praise the sun much more. So it is when someone makes the brilliance of the Sun of righteousness (Mal. 4:2) visible through his virtuous deeds. As soon as anyone looks at him, they are immediately led towards the glory of the Father in heaven of Christ, the Sun of righteousness.
St. Gregory Palamas
Homilies Vol. 1, Homily Ten para. 14; Saint Tikhon's Seminary Press pgs. 110-111, 14th century
Every work which does not have love as its beginning and root is nothing.
St. John Chrysostom
Unknown, 4th century
"But whosoever shall do and teach," said He, "shall be called great." For not to ourselves alone, should we be profitable, but to others also; since neither is the reward as great for him who guides himself aright, as for one who with himself adds also another.
St. John Chrysostom
Homilies 15 and 16 on Matthew 5, 4th Century
Since he who cannot teach himself, yet attempts to set others right, will have many to ridicule him. Or rather such a one will have no power to teach at all, his actions uttering their voice against him.
St. John Chrysostom
Homilies 15 and 16 on Matthew 5, 4th Century