Awareness of universals is called conceiving, and a universal of which we are aware is called a concept.
Boredom is... a vital problem for the moralist, since half the sins of mankind are caused by the fear of it.
Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd.
Conventional people are roused to fury by departure from convention, largely because they regard such departure as a criticism of themselves.
Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.
Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.
Freedom of opinion can only exist when the government thinks itself secure.
I like mathematics because it is not human and has nothing particular to do with this planet or with the whole accidental universe - because, like Spinoza's God, it won't love us in return.
In the revolt against idealism, the ambiguities of the word experience have been perceived, with the result that realists have more and more avoided the word.
It is preoccupation with possessions, more than anything else, that prevents us from living freely and nobly.