Example isn't another way to teach, it is the only way to teach.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
The man who regards his own life and that of his fellow-creatures as meaningless is not merely unfortunate but almost disqualified for life.
God gave me the stubbornness of a mule and a fairly keen scent.
... the desire for truth must take precedence over all other desires.
All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom.