"It is a cursed evil to any man to become so absorbed in any one subject as I am in mine."

"Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by sc…"

"It is always best to be a little under rather than over the mark."

"Man has risen to the very summit of the organic scale; and the fact of his having thus risen, instead of having been aboriginally placed there, is the best proof of his power of development."

"The greatest discovery of all is that the world is not as we thought it was."