You are free to do what you want, but you are not free to want what you want.

Life to the great majority is only a constant struggle for mere existence, with the certainty of losing it at last.

To conceal a want of real ideas, many make for themselves an imposing apparatus of long compound words, intricate flourishes and phrases, new and unheard-of expressions, all of which together furnish an extremely difficult jargon that sounds very learned. Yet with all this they say-precisely nothing.

The discovery of truth is prevented more effectively, not by the false appearance things present and which mislead into error, not directly by weakness of the reasoning powers, but by preconceived opinion, by prejudice.

[T]he moralists of Europe [have] pretended that beasts have no rights... a doctrine revolting/gross/barbarous... on which a native of the Asiatic uplands could not look without righteous horror.

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

Physics is unable to stand on its own feet, but needs a metaphysics on which to support itself, whatever fine airs it may assume towards the latter.