Appearances are a glimpse of the obscure.

What one man can invent another can discover.

The unknown is the largest need of the intellect.

How gloriously legible are the constellations of the heavens!

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

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

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

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

Science is a cemetery of dead ideas.

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