"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."

"In the very beginning of science, the parsons, who managed things then, Being handy with hammer and chisel, made gods in the likeness o' men; Till Commerce arose and at length some men of exceptional …"

"It is an unscientific habit to give names to things before we know what they are."

"The peculiar function of the scientific man is to make discoveries, not to talk about them."

"The greatest discoveries of science have always been the discovery of our ignorance."