The man with insight enough to admit his limitations comes nearest to perfection.

There are people who pay attention to the weaknesses of their friends; that is to no avail. I have always closely watched and profited from the strengths of my adversaries.

What by a straight path cannot be reached by crooked ways is never won.

Action has magic, grace and power in it.

When I consider the narrow limits within which our active and inquiring faculties are confined; when I see how all our energies are wasted in providing for mere necessities, which again have no further end than to prolong a wretched existence; and then that all our satisfaction concerning certain subjects of investigation ends in nothing better than a passive resignation... when I consider all this... I am silent.

Microscopes and telescopes really confuse our minds.

What is the path? There is no path. On into the unknown.