What sort of God would it be, who only pushed from without.

Men show their character in nothing more clearly than what they think laughable.

But one must know where one stands, and where the others wish to go.

Wood burns because it has the proper stuff in it; and a man becomes famous because he has the proper stuff in him.

In nature we never see anything isolated, but everything in connection with something else which is before it, beside it, under it and over it.

Hold your powers together for something good and let everything go that is for you without result and is not suited to you.

The use of a thing is only a part of its significance. To know anything thoroughly, to have the full command of it in all its appliances, we must study it on its own account, independently of any special application.