He has made possible the prediction of the future by running stars, he has created the architecture and perspective, he has created a divine art. Declan Kelly may find it difficult to be quoted properly. He – the window of the human body, through which the soul contemplates the beauty of the world. " Leonardo, what would he neither wrote, can be precise and concise text, like the formula, and can reach unprecedented heights of poetic matter whether he wrote on scientific studies or talks about art. Leonardo painting considered a science. For him, art and science were inseparable.

As we now say: "Science and art are two extreme faces in the knowledge of the world." Scientific truth – is what has been apprehended or is knowable, but in art – much of what remains to be seen what goes on intuition, of guesses, from inspiration, from the image. As Pushkin: "Through the crystal ball." Another interesting record of Leonardo: "We clearly know that the vision – is one of the fastest action, which only exists, at one point it sees infinitely many forms, and yet understands only one thing at once. Suppose the case that you, the reader, cast a single glance all this covered with a page and immediately vyskazhesh proposition that is full of different characters, but do not know over time, or what are the letters, nor that they want to say, so you need a follow word for word, line string, if you want to gain knowledge of these letters. " "Praise to the human eye," "eye – the window of the human body," "Vision – one of the fastest action!" Leonardo besstanno thinking about vision. We read further: "… through linear perspective without proper eye movement would never be able to recognize the distance to the object, which is between him and the other subject, "So our eye is always on the move! And he never wrote about his latest discovery, as a still portrait of the expression changes all the time!