Animation is different from other parts. Its language is the language of caricature. Our most difficult job was to develop the cartoon's unnatural but seemingly natural anatomy for humans and animals.Walt Disney
The painter who is familiar with the nature of the sinews, muscles, and tendons, will know very well, in giving movement to a limb, how many and which sinews cause it; and which muscle, by swelling, causes the contraction of that sinew; and which sinews, expanded into the thinnest cartilage, surround and support the said muscle.Leonardo da Vinci
The mind of the painter must resemble a mirror, which always takes the colour of the object it reflects and is completely occupied by the images of as many objects as are in front of it.Leonardo da Vinci
Painting is concerned with all the 10 attributes of sight; which are: Darkness, Light, Solidity and Colour, Form and Position, Distance and Propinquity, Motion and Rest.Leonardo da Vinci
Necessity is the mistress and guide of nature. Necessity is the theme and inventress of nature, her curb and her eternal law.Leonardo da Vinci