Before we acquire great power we must acquire wisdom to use it well.

Proportion is almost impossible to human beings. There is no one who does not exaggerate.

I cannot go to the houses of my nearest relatives, because I do not wish to be alone. Society exists by chemical affinity, and not otherwise.

It is frivolous to fix pedantically the date of particular inventions. They have all been invented over and over fifty times. Man is the arch machine, of which all these shifts drawn from himself are toy models. He helps himself on each emergency by copying or duplicating his own structure, just so far as then need is.

A man makes inferiors his superiors by heat; self-control is the rule.

Imagination is a very high sort of seeing, which does not come by study, but by the intellect being where and what it sees, by sharing the path, or circuits of things through forms, and so making them translucid to others.

Every natural fact is a symbol of some spiritual fact. Every appearance in nature corresponds to some state of the mind, and that state of the mind can only be described by presenting that natural appearance as its picture.