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

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

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

New things are always ugly.

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

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

Appearances are a glimpse of the obscure.

The unknown is the largest need of the intellect.

What one man can invent another can discover.

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

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

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

Science is a cemetery of dead ideas.