Liberty is not to be found in any form of government; she is in the heart of the free man; he bears her with him everywhere.

Chemistry... is like the maid occupied with daily civilisation; she is busy with fertilisers, medicines, glass, insecticides ... for she dispenses the recipes.

Being wealthy isn't just a question of having lots of money. It's a question of what we want. Wealth isn't an absolute, it's relative to desire. Every time we seek something that we can't afford, we can be counted as poor, how much money we may actually have.

At first we will only skim the surface of the earth like young starlings, but soon, emboldened by practice and experience, we will spring into the air with the impetuousness of the eagle, diverting ourselves by watching the childish behavior of the little men or awling miserably around on the earth below us.

We should not teach children the sciences; but give them a taste for them.

To try to conceal our own heart is a bad means to read that of others.

I long remained a child, and I am still one in many respects.