Genius is talent in which character makes itself heard.
To think that you are not following a rule is to follow a rule.
What we cannot speak about we must pass over in silence.
If a lion could talk, we could not understand him.
Logic takes care of itself; all we have to do is to look and see how it does it.
It would strike me as ridiculous to want to doubt the existence of Napoleon; but if someone doubted the existence of the earth 150years ago, perhaps I should be more willing to listen, for now he is doubting our whole system of evidence.