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.

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

Science is a cemetery of dead ideas.

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

The unknown is the largest need of the intellect.

What one man can invent another can discover.

What one man can invent another can discover.

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

The eternal mystery of the world is its comprehensibility.

The discovery of a new dish does more for human happiness than the discovery of a star.

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

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