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

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

What one man can invent another can discover.

Appearances are a glimpse of the obscure.

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

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

New things are always ugly.

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

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

The unknown is the largest need of the intellect.

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

I learned to make my mind large, as the universe is large, so that there is room for paradoxes.

One doesn’t discover new lands without consenting to lose sight of the shore for a very long time.