First they came for the jews. I was silent. I was not a jew. Then they came for the communists. — Martin Niemoller
A stupid person should keep silent. But if he knew this, he would not be a stupid person. — Muslih-ud-Din Saadi
So long as you live and work, you will be misunderstood; to that you must resign yourself once and for all. Be silent! — Johann Wolfgang von Goethe
I think the first virtue is to restrain the tongue; he approaches nearest to Gods who knows — Cato the Elder
We pass and leave you lying. No need for rhetoric, for funeral music, for melancholy bugle-calls. — Richard Aldington