There are things known and there are things unknown, and in between are the doors of perception.

There is always time to add a word, never to withdraw one.

A single lie destroys a whole reputation of integrity.

Take care of the pieces well. The whole will take care of itself.

What's done can't be undone.

The impossible could not have happened, therefore the impossible must be possible in spite of appearances.

Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more

The best revenge is to be unlike him who performed the injury.

Don't raise your voice, improve your argument.

Reflect upon your present blessings, of which every man has many; not on your past misfortunes, of which all men have some.

Do not deny the classical approach, simply as a reaction, or you will have created another pattern and trapped yourself there.

You cannot truly listen to anyone and do anything else at the same time.

Accuracy is the twin brother of honesty; inaccuracy, of dishonesty.

Empty your cup so that it may be filled; become devoid to gain totality.

We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.

Most of what matters in our lives takes place in our absence.

If you have no problems, then you have no clue to what is going.

You are the bows from which your children as living arrows are sent forth.

Knowledge speaks, but wisdom listens

He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.

The ethos of redemption is realized in self-mastery, by means of temperance, that is, continence of desires.