Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.
We know more about the movement of celestial bodies than about the soil underfoot.
Good writing comes from good talent.
Having wandered some distance among gloomy rocks, I came to the entrance of a great cavern ... Two contrary emotions arose in me: fear and desire--fear of the threatening dark cavern, desire to see whether there were any marvelous things in it.
There are many kinds of beauty as people who possess it.
The cat is nature's masterpiece.
Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.
A good painter is to paint two main things, men and the working of man's mind.
The eye encompasses the beauty of the whole world.
I roamed the countryside searching for answers to things I did not understand.
To lie is vile, to tell truth is excellent, if not noble.
I wish to work miracles.
While you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.
Lying on a feather mattress or quilt will not bring you renown.
For those colours which you wish to be beautiful, always first prepare a pure white ground.
The soul is content to stay imprisoned in the human body... for through the eyes all the various things of nature are represented to the soul.
The study of what is excellent is food for the mind and body.
Strive to preserve your health; and in this you will better succeed in proportion as you keep clear of the physicians, for their drugs are a kind of alchemy concerning which there are no fewer books than there are medicines.
Whatever you think matters - doesn't. Follow this rule, and you will add decades to your life. Rodger Rosenblatt As a well spent day brings happy sleep, so life well used brings happy death.
The beginnings and ends of shadow lie between the light and darkness and may be infinitely diminished and infinitely increased. Shadow is the means by which bodies display their form. The forms of bodies could not be understood in detail but for shadow.
He who in reasoning cites authority is making use of his memory rather than of his intellect.
Nature alone is the master of true genius.
Every action needs to be prompted by a motive.
Learning acquired in youth arrests the evil of old age; and if you understand that old age has wisdom for its food, you will so conduct yourself in youth that your old age will not lack for nourishment.
A gray day provides the best light.
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