When you put your hand in a flowing stream, you touch the last that has gone before and the first of what is still to come.

All knowledge which ends in words will die as quickly as it came to life, with the exception of the written word: which is its mechanical part.

Man and animals are in reality vehicles and conduits of food, tombs of animals, hostels of death, coverings that consume, deriving life by the .

The mind of the painter must resemble a mirror, which always takes the colour of the object it reflects and is completely occupied by the images of as many objects as are in front of it.

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

The painter who draws merely by practice and by eye, without any reason, is like a mirror which copies every thing placed in front of it without being conscious of their existence.

Each man is always in the middle of the surface of the earth and under the zenith of his own hemisphere, and over the centre of the earth.

Weight, force and casual impulse, together with resistance, are the four external powers in which all the visible actions of mortals have their being and their end.

Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

For, verily, great love springs from great knowledge of the beloved object, and if you little know it, you will be able to love it only little or not at all.

Knowledge of the past and of the places of the earth is the ornament and food of the mind of man.