Man discovers truth by reason only, not by faith.

Better to know a few things which are good and necessary than many things which are useless and mediocre

Everything intelligent is so boring.

If, then, I were asked for the most important advice I could give, that which I considered to be the most useful to the men of our century, I should simply say: in the name of God, stop a moment, cease your work, look around you.

And once he had seen this, he could never again see it otherwise, just as we cannot reconstruct an illusion once it has been explained.

He stepped down, trying not to look long at her, as if she were the sun, yet he saw her, like the sun, even without looking.

In our day the feeling of patriotism is an unnatural, irrational, and harmful feeling, and a cause of a great part of the ills from which mankind is suffering, and that, consequently, this feeling - should not be cultivated, as is now being done, but should, on the contrary, be suppressed and eradicated by all means available to rational men.