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

A man of genius makes no mistakes. His errors are volitional and are the portals of discovery.

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

The eternal mystery of the world is its comprehensibility.

I am tormented with an everlasting itch for things remote. I love to sail forbidden seas and land on barbarous coasts.

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

What one man can invent another can discover.

Science is a cemetery of dead ideas.

One doesn’t discover new lands without consenting to lose sight of the shore for a very long time.

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

How gloriously legible are the constellations of the heavens!

Appearances are a glimpse of the obscure.

The unknown is the largest need of the intellect.