The water which rises in the mountains is the blood which keeps the mountain in life.
Leonardo da VinciEvery part is disposed to unite with the whole, that it may thereby escape from its own incompleteness.
Leonardo da VinciA luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.
Leonardo da VinciI 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.
Leonardo da Vinci