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

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

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.

There are truths that prove their discoverers witless.

Appearances are a glimpse of the obscure.

What one man can invent another can discover.

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

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

The unknown is the largest need of the intellect.

Science is a cemetery of dead ideas.

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

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