"The true beginning of all knowledge is the discovery of something we do not know."

"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 …"

"In the present state of science, it would be a rash thing to assert that any one physical constant is absolutely constant."

"The true logic of this world is in the calculus of probabilities."

"The opinion seems to have got abroad, that in a few years all the great physical constants will have been approximately estimated, and that the only occupation which will then be left to men of scienc…"