Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.

The mind that engages in subjects of too great variety becomes confused and weakened.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.

Nothing can be loved or hated unless it is first known.

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

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.

Beauty perishes in life, but is immortal in art.