“A Christian must be truthful and honest. But above all truthful and honest with himself and in relation to himself. And in life you should learn to tell the truth first of all when a lie could have benefited you or covered your sin. Or when the truth can prevent slander, protect the weak and the defenseless, or prevent meanness and injustice. In general, always tell the truth when it comes with difficulty and requires courage, and when the final result of the truth is righteousness, and not a smug sense of being right.”
(Archpriest Vladimir Puchkov in Orthodox Life)