A.T. Robertson Commentary Matthew 5:16

"Even so let your light shine before men; that they may see your good works, and glorify your Father who is in heaven." — Matthew 5:16 (ASV)

Even so (ουτως). The adverb points backward to the lamp-stand. Thus men are to let their light shine, not to glorify themselves, but "your Father in heaven." Light shines to see others by, not to call attention to itself.