How much of human life is lost in waiting.

Economy does not consist in saving the coal, but in using the time while it burns.

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.

We cannot let our angels go; we do not see that they only go out that archangels may come in.

I remember the thought which occurred to me when some ingenious and spiritual foreigners came to America, was, Have you been victimized in being brought hither?--or, prior to that, answer me this, "Are you victimizable?

The hero is he who is immovably centered.

The laws of light and of heat translate each other;-so do the laws of sound and colour; and so galvanism, electricity and magnetism are varied forms of this selfsame energy.