To me it seems that those sciences are vain and full of error which are not born of experience, mother of all certainty, first-hand experience which in its origins, or means, or end has passed through one of the five senses.

I love those who can smile in trouble.

A bird is an instrument working according to mathematical law, which instrument it is within the capacity of man to reproduce with all its movements.

The water which rises in the mountains is the blood which keeps the mountain in life.

In life beauty perishes, but not in art.

We might say that the earth has the spirit of growth; that its flesh is the soil.

The discovery of a good wine is increasingly better for mankind than the discovery of a new star.