"I have been battering away at Saturn, returning to the charge every now and then. I have effected several breaches in the solid ring, and now I am splash into the fluid one, amid a clash of symbols tr…"

"The mathematical difficulties of the subject are so enormous that it is only by great patience and perseverance that we can hope to overcome them."

"I saw a rat today in the college garden, and I thought how much more pleasant it would be to be a rat than a professor."

"The present state of science is such that we cannot hope to explain all the phenomena of nature by means of a few simple laws."

"The mind of man is like a mirror, which reflects the images of things, but does not always reflect them truly."