We call mad the man with one fixed idea, and sane the man with none.
Operations of thought are like cavalry charges in a battle — they are strictly limited in number, require fresh horses, and must only be made at decisive moments.
Man begins by treating objects as agents; then he grows scientific, and treats agents as objects.
All statistical arguments are in bad faith.
To discover the most appalling ignorance of science one need only canvass its most vociferous defenders.
Free thinking, and worth every penny.
Humans think as women preach — not well, but one is surprised to find it done at all.
Sometimes we imagine things into existence, more often out of it.
The force of an analogy lies in the similarity; the point lies in the difference.
To follow your heart is exactly what people who are skilled at manipulating your emotions want you to do.
We rarely absorb ideas; they settle on us, like dust or ash.