Consider the Koran... this wretched book was sufficient to start a world-religion, to satisfy the metaphysical need of countless millions for twelve hundred years, to become the basis of their morality and of a remarkable contempt for death, and also to inspire them to bloody wars and the most extensive conquests. In this book we find the saddest and poorest form of theism. Much may be lost in translation, but I have not been able to discover in it one single idea of value.

You can do what you will, but in any given moment of your life you can will only one definite thing and absolutely nothing other than that one thing.

What a man is: that is to say, personality, in the widest sense of the word; under which are included health, strength, beauty, temperament, moral character, intelligence, and education.

The young should early be trained to bear being left alone; for it is a source of happiness and peace of mind.

A man can be himself only so long as he is alone; and if he does not love solitude, he will not love freedom; for it is only when he is alone that he is really free.

...in the end every one stands alone, and the important thing is who it is that stands alone.

Life is full of troubles and vexations, that one must either rise above it by means of corrected thoughts, or leave it.