Wonder is the feeling of a philosopher; and philosophy begins in wonder.
There is no opinion so absurd but that some philosopher will express it.
The philosopher is Nature’s pilot. And there you have our difference: to be in hell is to drift: to be in heaven is to steer.
To be a philosopher is not merely to have subtle thoughts; but so to love wisdom as to live according to its dictates.
It is easy for men to write and talk like philosophers, but to act with wisdom, there is the rub!
The philosophers have only interpreted the world; the thing, however, is to change it.
Philosophy: A route of many roads leading from nowhere to nothing.
Philosophy triumphs easily over past and future evils; but present evils triumph over it.
The discovery of what is true, and the practice of that which is good, are the two most important objects of philosophy.
Clearness marks the sincerity of philosophers.