We can always get along better by reason and love of truth than by worry of conscience and remorse. Harmful are these and evil.

The highest activity a human being can attain is learning for understanding, because to understand is to be free.

The most tyrannical of governments are those which make crimes of opinions, for everyone has an inalienable right to his thoughts.

If you want the present to be different from the past, study the past.

No matter how thin you slice it, there will always be two sides.

Reason connot defeat emotion, an emotion can only be displaced or overcome by a stronger emotion.

Nothing in nature is by chance... Something appears to be chance only because of our lack of knowledge.

The more clearly you understand yourself and your emotions, the more you become a lover of what is.

Men believe themselves to be free, simply because they are conscious of their actions, and unconscious of the causes whereby those actions are determined.

The world would be happier if men had the same capacity to be silent that they have to speak.

The highest endeavor of the mind, and the highest virtue, it to understand things by intuition.

In every marriage more than a week old there are grounds for divorce. The trick is to find and continue to find grounds for marriage.

Today's science is tomorrow's technology.

Money is only a tool. It will take you wherever you wish, but it will not replace you as the driver.

The grace to define your self is spiritual act.

Identification of rhythm as the casual counterpart of life; wherever there is some life, only perceptible to us when the analogies are sufficiently close.

Mastery of the German language and the acceptance of our legal system has to become part of the criteria for naturalization.

Evolution is, as well as smarter than we are, infinitely more callous and cruel, and also capricious.

It is not the easy or convenient life for which I search, but life lived to the edge of all that I may be.

Every path to a new understanding begins in confusion.

If you can't explain something to a first year student, then you haven't really understood .