“There are two motives for reading a book; one, that you enjoy it; the other, that you can boast about it.”

“Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.”

“Of all forms of caution, caution in love is perhaps the most fatal to true happiness.”

“Is there any knowledge in the world which is so certain that no reasonable man could doubt it?”

“Philosophy, though unable to tell us with certainty what is the true answer to the doubts which it raises, is able to suggest many possiblities which enlarge our thoughts and free them from...”

“The man who has no tincture of philosophy goes through life imprisoned in the prejudices derived from common sense, from the habitual beliefs of his age or his nation, and from convictions w...”