Science is a cemetery of dead ideas.

The unknown is the largest need of the intellect.

What one man can invent another can discover.

The eternal mystery of the world is its comprehensibility.

There are truths that prove their discoverers witless.

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

New things are always ugly.

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

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

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.

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

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