Know your limits, but never stop trying to exceed them.
We don't read and write poetry because it's cute. We read and write poetry because we are members of the human race. And the human race is filled with passion. And medicine, law, business, engineering, these are noble pursuits and necessary to sustain life. But poetry, beauty, romance, love, these are what we stay alive for.
If you seek to understand the whole universe you will understand nothing at all but seek to understand yourself and you will understand the whole universe.
A leader is someone who compels others to positive action by the power of their own positive action.
Democracy is two wolves and a lamb deciding what to have for dinner. Liberty is a well-armed lamb.