Happy will be those who give ear to the words of the dead: - The reading of good works and the observing of their precepts.
In an atmosphere of uniform density the most distant things seen through it, such as the mountains, in consequence of the great quantity of atmosphere which is between your eye and them, will appear blue. Therefore you should make the building... wall which is more distant less defined and bluer... five times as far away, make five times as blue.
The bones of the Dead will be seen to govern the fortunes of him who moves them.
The divisions of Perspective are 3, as used in drawing; of these, the first includes the diminution in size of opaque objects; the second treats of the diminution and loss of outline in such opaque objects; the third, of the diminution and loss of colour at long distances.
There are three aspects to perspective. The first has to do with how the size of objects seems to diminish according to distance: the second, the manner in which colors change the farther away they are from the eye; the third defines how objects ought to be finished less carefully the farther away they are.
Given the cause nature produces the effect in the briefest manner that it can employ.
Nature varies the seed according to the variety of the things she desires to produce in the world.
Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass, though but slowly.
When you look at a wall spotted with stains...you may discover a resemblance to various landscapes, beautiful with mountains, rivers, rocks, trees. Or again, you may see battles and figures in action, or strange faces and costumes, and an endless variety of objects which you could reduce to complete and well-drawn figures.
I think it is no small attraction in a painter to be able to give a pleasing air to his figures, and whoever is not naturally possessed of this grace may acquire it by study, as opportunity offers in the following manner: be on the watch to take good parts of many beautiful faces of which the beautiful parts are established by general repute rather than by your own judgement, for you may deceive yourself by selecting faces that resemble your own, since it often seems that such similarities please us; ... so therefore choose the beautiful ones as I tell you and fix them in your mind.
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.
All objects transmit their image to the eye in pyramids and the nearer to the eye these pyramids are intersected the smaller will the image appear of the objects which cause them.
Although the poet has as wide a choice of subjects as the painter, his creations fail to afford as much satisfaction to mankind as do paintings... if the poet serves the understanding by way of the ear, the painter does so by the eye, which is the nobler sense.
The soul can never be corrupted with the corruption of the body, but it is like the wind which causes the sound of the organ, and which ceases to produce a good effect when a pipe is spoilt.
He who draws... ought to take his position so that the eye of the figure he is drawing is on a level with his own... because, generally, figures or people whom you meet in the streets all have their eyes at the same level as yours, and if you make them higher or lower you will find that your portrait will not resemble them.
I say that the power of vision extends through the visual rays to the surface of non-transparent bodies, while the power possessed by these bodies extends to the power of vision.
The evil which does me no harm is like the good which in no wise avails me.
Many will be busied in taking away from a thing, which will grow in proportion as it is diminished.
The motions of men must be such as suggest their dignity or their baseness.
Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.
Science is the captain, and practice the soldiers.
A life well used procures a happy death.
The boundaries of bodies are the least of all things.
Savage is he who saves himself.
It reflects no great honor on a painter to be able to execute only one thing well -- such as a head, an academy figure, or draperies, animals, landscapes, or the like -- in other words, confining himself to some particular object of study. This is so because there is scarcely a person so devoid of genius as to fail of success if he applies himself earnestly to one branch of study and practices it continually.
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