There are certain things that our age needs. It needs, above all, courageous hope and the impulse to creativeness.

Dogmatism is the greatest of mental obstacles to human happiness.

Of all forms of caution, caution in love is perhaps the most fatal to true happiness.

Nothing is so exhausting as indecision, and nothing is so futile.

What makes a free thinker is not his beliefs, but the way in which he holds them. If he holds them because his elders told him they were true when he was young, or if he holds them because if he did not he would be unhappy, his thought is not free; but if he holds them because, after careful thought, he finds a balance in their favor, then his thought is free, however odd his conclusions may seem.

The wise man thinks about his troubles only when there is some purpose in doing so; at other times he thinks about other things, or, if it is night, about nothing at all.

People are zealous for a cause when they are not quite positive that it is true.