If at first the idea is not absurd, then there is no hope for it.
Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.
Keep fighting until the last buzzer sounds.
A man's ethical behaviour should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.
You can't blame gravity for falling in love.
A serious-minded man enjoys a good laugh now and then.