“It is said there that if someone gives alms, prays, or fasts for public recognition, they already receive their reward from people in the form of admiration and praise, and thus have no further reward from the Lord. But if one desires to do these acts for the Lord, then when giving alms, let not thy left hand know what thy right hand doeth (Matthew 6:3). When praying, enter into thy closet, and when thou hast shut thy door (Matthew 6:6). And when fasting, be not, as the hypocrites, of a sad countenance (Matthew 6:16-17).”
(Archpriest Vyacheslav Reznikov, orthochristian.com)