When they shout “Long live progress,” always ask, “Progress of what?”

The unknown is the largest need of the intellect.

One sees great things from the valley; only small things from the peak.

There are truths that prove their discoverers witless.

I learned to make my mind large, as the universe is large, so that there is room for paradoxes.

How gloriously legible are the constellations of the heavens!

What one man can invent another can discover.

They are ill discoverers that think there is no land, when they can see nothing but sea.

New things are always ugly.

Appearances are a glimpse of the obscure.