"Non-Euclidean calculus and quantum physics are enough to stretch any brain; and when one mixes them with folklore, and tries to trace a strange background of multi-dimensional reality behind the ghoulish hints of the gothic tales and wild whispers of the chimney-corner, one can hardly expect to be wholly free from mental tension."

"The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka' ( I found it ) but 'that's funny.'"