Nature uses as little as possible of anything.

Truth is the daughter of time, 

and I feel no shame in being her midwife.

I much prefer 

the sharpest criticism 

of a single intelligent man 

to the thoughtless approval 

of the masses.

The diversity of the phenomena of nature is so great, 

and the treasures hidden in the heavens so rich, 

precisely in order that the human mind shall never be lacking 

in fresh nourishment.

Why are things as they are and not otherwise?