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

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

What one man can invent another can discover.

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

Appearances are a glimpse of the obscure.

The unknown is the largest need of the intellect.

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

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

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

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

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

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.