What is one man's gain is another's loss.

Our quaint metaphysical opinions, in an hour of anguish, are like playthings by the bedside of a child deathly sick.

The devil is not, indeed, perfectly humorous, but that is only because he is the extreme of all humor.

And in today already walks tomorrow.

I shall attack Chemistry, like a Shark.

The first man of science was he who looked into a thing, not to learn whether it furnished him with food, or shelter, or weapons, or tools, armaments, or playwiths but who sought to know it for the gratification of knowing.

Ignorance seldom vaults into knowledge.