Feathers shall raise men even as they do birds towards heaven :- That is by letters written with their quills.
Leonardo da VinciJust as iron rusts from disuse, and stagnant water putrefies, or when cold turns to ice, so our intellect wastes unless it is kept in use.
Leonardo da VinciWe know more about the movement of celestial bodies than about the soil underfoot.
Leonardo da VinciThe sun gives spirit and life to the plants and the earth nourishes them with moisture.
Leonardo da VinciLet proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.
Leonardo da Vinci... we might say that the earth has a spirit of growth; that its flesh is the soil, its bones the arrangement and connection of the rocks of which the mountains are composed, its cartilage the tufa, and its blood the springs of water.
Leonardo da VinciIf we make mistakes in our first compositions and do not know them, we may not amend them.
Leonardo da VinciWhile you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.
Leonardo da VinciOf the four elements water is the second in weight and the second in respect of mobility. It is never at rest until it unites with the sea.
Leonardo da VinciGood culture is born of a good disposition; and since the cause is more to be praised than the effect, I will rather praise a good disposition without culture, than good culture without the disposition.
Leonardo da VinciPatience serves as a protection against wrongs as clothes do against cold. For if you put on more clothes as the cold increases, it will have no power to hurt you. So in like manner you must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind.
Leonardo da VinciThough I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.
Leonardo da VinciTo 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.
Leonardo da VinciYou should prefer a good scientist without literary abilities than a literate one without scientific skills
Leonardo da VinciDemetrius was wont to say that there was no difference between the words and speech of the unskilled and ignorant and the sounds and rumblings caused by the stomach being full of superfluous wind. This he said, not without reason, for, as he held, it did not in the least matter from what part of them the voice emanated, whether from the lower parts or the mouth, since the one and the other were of equal worth and importance.
Leonardo da VinciWhat induces you, oh man, to depart from your home in town, to leave parents and friends, and go to the countryside over mountains and valleys, if it is not for the beauty of the world of nature?
Leonardo da VinciMan has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.
Leonardo da Vinci