Every man takes the limits of his own field of vision for the limits of the world.

The eternal mystery of the world is its comprehensibility.

How gloriously legible are the constellations of the heavens!

What one man can invent another can discover.

The discovery of a new dish does more for human happiness than the discovery of a star.

Appearances are a glimpse of the obscure.

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

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

Nature has planted in our minds an insatiable desire to seek the truth.

Science is a cemetery of dead ideas.

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

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

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