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

How gloriously legible are the constellations of the heavens!

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

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

What one man can invent another can discover.

The unknown is the largest need of the intellect.

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

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

Science is a cemetery of dead ideas.

What one man can invent another can discover.