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.
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.
I have found that, in the composition of the human body as compared with the bodies of animals, the organs of sense are duller and coarser. Thus, it is composed of less ingenious instruments, and of spaces less capacious for receiving the faculties of sense.
Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.
Things that are separate shall be united and acquire such virtue that they will restore to man his lost memory.
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.
For youth, everything is sport.
Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them.
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.
A day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.
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.
Man and animals are in reality vehicles and conduits of food, tombs of animals, hostels of Death, coverings that consume, deriving life by the death of others.
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.
Instrumental or mechanical science is the noblest and above all others, the most useful.
Black is like a broken vessel, which is deprived of the capacity to contain anything.
O Time with your teethy years! You swallow up all things little by little in a slow-motion, wrinkling process of dying.
Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.
Experiment is the sole interpreter of the artifices of Nature.
The art of procreation and the members employed therein are so repulsive, that if it were not for the beauty of the faces and the adornments of the actors and the pent-up impulse, nature would lose the human species.
Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law.
Painting is concerned with the ten things you can see: these are darkness and brightness, substance and color, form and place, remoteness and nearness, movement and rest.
It is an acknowledged fact that we perceive errors in the work of others more readily than in our own.
The eye, the window of the soul, is the chief means whereby the understanding can most fully and abundantly appreciate the infinite works of Nature; and the ear is second.
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