Fame alone raises herself to Heaven, because virtuous things are in favour with God.
It reflects no great honour on a painter to be able to execute one thing well.
We may call painting the grandchild of nature.
Those who become enamoured of the art, without having previously applied to the diligent study of the scientific part of it, may be compared to mariners who put to the sea in a ship without rudder or compass and therefore cannot be certain of arriving at the wished for port.
In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.
I am not to blame for putting forward, in the course of my work on science, any general rule derived from a previous conclusion.
All the bystanders at an event worthy of note adopt various gestures of admiration when contemplating the occurrence.
Medicine is the restoration of discordant elements.
Why are the bones of great fishes, and oysters and corals and various other shells and sea-snails, found on the high tops of mountains that border the sea, in the same way in which they are found in the depths of the sea?
Perspective is the rein and rudder of painting.
There is no object so large but that at a great distance from the eye it does not appear smaller than a smaller object near.
Nature is so delightful and abundant in its variations that among trees of the same kind there would not be found one which nearly resembles another, and not only the plants as a whole, but among their branches, leaves, and fruit, will not be found one which is precisely like another.
Be eager to lend a patient ear to the opinions of others and think long and hard whether whoever finds fault has reason or not to censure you. And if the answer is yes, correct the fault. If no, give the impression that you have not heard him, or if he is a man whom you respect, explain to him why he is mistaken.
The limiting surface of one thing is the beginning of another.
The eye - which sees all objects reversed - retains the images for some time.
Shadows which you see with difficulty, and whose boundaries you cannot define... these you should not represent as finished or sharply defined, for the result would be that your work would seem wooden.
I know very well that because I am unlettered some presumptuous people will think they have the right to criticize me, saying that I am an uncultured man. What stupid fools! Do they not know that I could reply to them as Marius did to the Roman patricians: "Do those who pride themselves on the works of other men claim to challenge mine?
How painting surpasses all human works by reason of the subtle possibilities which it contains.
Weight is caused by one element being situated in another; and it moves by the shortest line towards its centre, not by its own choice, not because the centre draws it to itself, but because the other intervening element cannot withstand it.
Why seek to embarrass [the artist] with vanities foreign to his quietness? Know you not that certain sciences require the whole man, leaving no part of him at leisure for your trifles?
Life well spent is long.
If we make mistakes in our first compositions and do not know them, we may not amend them.
Do not imitate one another's style. If you do, so far as your art is concerned you will be called a grandson, rather than the son of Nature.
Avoid studies of which the result dies with the worker.
Sculptured figures which appear in motion, will, in their standing position, actually look as if they were falling forward.
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