“There are no uninteresting things, only uninterested people.”

“There is no such thing on earth as an uninteresting subject; the only thing that can exist is an uninterested person.”

“The people who wrote the mediaeval ballads knew more about fairies than you do. It isn't only nice things that happen in fairyland. .…I never said it was wrong to enter fairyland. I only said it was dangerous.”

“metaphysics is the only thoroughly emotional thing.”

“A dead thing can go with the stream, but only a living thing can go against it.”

“Humility is the mother of giants. One sees great things from the valley; only small things from the peak.”

“There is only one thing that that it requires real courage to say, and that is a truism.”