Real knowledge is to know the extent of one's ignorance.
There are things known and there are things unknown, and in between are the doors of perception.
Promises are like crying babies in a theater, they should be carried out at once.
Man is the only creature who refuses to be what he is.
Wrong life cannot be lived rightly.
Anger begins in folly, and ends in repentance.
Adapt what is useful, reject what is useless, and add what is specifically your own.
To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.
An intelligent hell would be better than a stupid paradise.
Love one another, but make not a bond of love: Let it rather be a moving sea between the shores of your souls.
You always admire what you really don't understand.
If you don't behave as you believe, you will end by believing as you behave.
Don't criticize what you don't understand, son. You never walked in that man's shoes.
Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy.
Taste every fruit of every tree in the garden at least once. It is an insult to creation not to experience it fully. Temperance is wickedness.
The experience gathered from books, though often valuable,is but the nature of learning whereas the experience gained from actual life is of the nature of wisdom.
I've never known any trouble than an hour's reading didn't assuage.
Those who can not change their minds can not change anything.
If I speak of myself in different ways, that is because I look at myself in different ways.
Work is the price which is paid for reputation.
Yesterday is but today's memory and tomorrow is today's dream.