If we understand that virtue is the only true good, we shall see that no real evil can befall us.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“We should not say “I am an Athenian” or “I am a Roman,” but “I am a citizen of the universe.” If you were a kinsman of Caesar, you would feel safe; how much more should you feel safe in being a kinsman of God? If we understand that virtue is the only true good, we shall see that no real evil can befall us. I must die. But must I die groaning? I must be imprisoned. But must I whine as well? I must suffer exile. Can any one then hinder me from going with a smile, and a good courage, and at peace? “Tell the secret.”” source