And when you pray, you shall not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
All Commentaries on Matthew 6:5 Go To Matthew 6
John Chrysostom
AD 407
Your inner will cannot be hid. This is why Jesus did not say, “They shall not receive a reward” but “They have received their reward”—already! Their reward comes from those from whom they themselves most desire to get it. God does not desire this. For God preferred to bestow upon humanity the grace that comes only from himself. Those who seek their reward from people cannot receive another reward from the One for whom they have sought nothing. The Gospel of Matthew, Homily