Our body is dependent on heaven and heaven on the Spirit.
The light and heat of the universe comes from the sun, and its cold and darkness from the withdrawal of the sun.
We ought not to desire the impossible.
Here is a thing which the more it is needed the more it is rejected: and this is advice, which is unwillingly heeded by those who most need it, that is to say, by the ignorant.
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.
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.
Perspective is a most subtle discovery in mathematical studies, for by means of lines it causes to appear distant that which is near, and large that which is small.
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.
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.
Every action done by nature is done in the shortest way.
King of the animals — as thou hast described him — I should rather say king of the beasts, thou being the greatest — because thou hast spared slaying them, in order that they may give thee their children for the benefit of the gullet, of which thou hast attempted to make a sepulchre for all animals; and I would say still more, if it were allowed me to speak the entire truth.
Anyone who invokes authors in discussion is not using his intelligence but his memory.
Depth and strength of a human character are defined by its moral reserves.
You will never have a greater or lesser dominion than that over yourself.
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.
Feathers shall raise men even as they do birds towards heaven :- That is by letters written with their quills.
Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.
Of the horse I will say nothing because I know the times.
The good painter must paint two things: a person and the essence of his soul.
Men standing in opposite hemispheres will converse and deride each other and embrace each other, and understand each other's language.
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.
We, by our arts may be called the grandsons of God.
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.
Necessity is the mistress and guide of nature.
Movement will fail sooner than usefulness.
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