Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.

Our life is made by the death of others.

I have from an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men.

If you put on more clothes as the cold increases, it will have no power to hurt you. Let us hope that.

Nature alone is the master of true genius.

There is no higher or lower knowledge, but one only, flowing out of experimentation.

Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.