What one man can invent another can discover.

The atavistic urge toward danger persists and its satisfaction is called adventure.

True originality consists not in a new manner but in a new vision.

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

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

Most new discoveries are suddenly-seen things that were always there.

Science is a cemetery of dead ideas.

Appearances are a glimpse of the obscure.

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

There are truths that prove their discoverers witless.