The painter strives and competes with nature.
Men of genius sometimes accomplish most when they work least, for they are thinking out inventions.
Shadow is the diminution alike of light and of darkness, and stands between darkness and light.
Depth and strength of a human character are defined by its moral reserves.
The memory of benefits is a frail defence against ingratitude.
A man was desired to rise from bed because the sun was already up. He replied: "If I had as far to go and as much to do as he has, I should be up by now; but having but a little way to go, I shall not get up yet."
Fire destroys all sophistry, that is deceit; and maintains truth alone, that is gold.
Medicine is the restoration of discordant elements; sickness is the discord of the elements infused into the living body.
Intellectual passion drives out sensuality.
Men wrongly lament the flight of time, blaming it for being too swift; they do not perceive that its passage is sufficiently long, but a good memory, which nature has given to us, causes things long past to seem present.
The acquisition of knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good. For nothing can be loved or hated unless it is first known.
A beautiful body perishes, but a work of art dies not.
Every action done by nature is done in the shortest way.
Nothing is more apt to deceive us than our own judgment of our work. We derive more benefit from having our faults pointed out by our enemies than from hearing the opinions of friends.
Experiment is the sole interpreter of the artifices of Nature.
Do not reveal, if liberty is precious to you; my face is the prison of love.
The part always has a tendency to reunite with its whole in order to escape from its imperfection.
What is fair in men, passes away, but not so in art
Nothing is so much to be feared as Evil Report.
When the thing taken into union is perfectly adapted to that which receives it, the result is delight and pleasure and satisfaction.
When you draw a nude, sketch the whole figure and nicely fit the members to it and to each other. Even though you may only finish one portion of the drawing, just make certain that all the parts hang together, so that the study will be useful to you in the future.
Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them.
Things that are separate shall be united and acquire such virtue that they will restore to man his lost memory.
Every action needs to be prompted by a motive. To know and to will are two operations of the human mind. Discerning, judging, deliberating are acts of the human mind.
In whatever system where the weight attached to the wheel should be the cause of motion of the wheel, without any doubt the center of the gravity of the weight will stop beneath the center of its axle. No instrument devised by human ingenuity, which turns with its wheel, can remedy this effect. Oh, speculators about perpetual motion, how many vain chimeras have you created in the like quest. Go and take you place with the seekers after gold.
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