"Every existence above a certain rank has its singular points; the higher the rank the more of them. At these points, influences whose physical magnitude is too small to be taken account of by a finite…"

"The only way to avoid being wrong is to say nothing."

"But I think that the results which each man arrives at in his attempts to harmonize his science with his Christianity ought not to be regarded as having any significance except to the man himself, and…"

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

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