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

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

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

The eternal mystery of the world is its comprehensibility.

Research is formalized curiosity. It is poking and prying with a purpose. 

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

The unknown is the largest need of the intellect.

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

What one man can invent another can discover.

What one man can invent another can discover.

Science is a cemetery of dead ideas.

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

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