We have all of our ideas at second hand, except the ones we think original, which we have at fourth or fifth.
Error is boundless.
Nor hope nor doubt,
Though both be groundless,
Will average out.
Naive irrationality is the refusal to refer actions and sentiments to abstract principle; decadent irrationality is the insistence on it.
Psychology begins by classifying people according to their conduct; then grows scientific, and deduces conduct from the classifications.
Our idea that beliefs, in themselves, can make one virtuous — what is it but grace by faith?
Ideology, n. A system of belief that leads to frumpiness.
Philosophy is so well-trod that there is scarcely room for a new mistake.
After an act of intellectual malpractice so egregious that nothing can excuse it, there is only one thing to say: “My point still stands.”
It is easy to mistake the destruction of one’s world-view for the destruction of the world.
There’s no harm in opinions, as long as you don’t believe them.
The people who most need to be persuaded of their own stupidity have been told all their lives how clever they are.