If you hear or see someone sin...

…keep from slandering him and judging him. You tell someone else about him, he tells it to another, the other to the third, the third to the fourth, and so everyone will come to know and be tempted. And they will judge the one who sinned, which is a very serious thing. And you will be the cause of all this, by publishing your brother’s sin. Slanderers are like lepers that harm others by their foul odor, or like those stricken by the plague who carry their disease from place to place and destroy others. Keep yourself, then, from slandering your neighbor, lest you sin gravely and give someone else cause for sin.

St. Tikhon of Zadonsk
1724-1783