Let 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 More Quotes by Leonardo da Vinci More Quotes From Leonardo da Vinci To 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 Vinci motherphilosophymean If you are alone you belong entirely to yourself. Leonardo da Vinci thoughtlessnesssolitudeifs But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not terminate in an actual experience. Leonardo da Vinci errorsmotherscience He turns not back who is bound to a star. Leonardo da Vinci quittingstarsinspirational It is ordained that to the ambitious, who derive no satisfaction from the gifts of life and the beauty of the world, life shall be a cause of suffering, and they shall possess neither the profit nor the beauty of the world. Leonardo da Vinci ambitiousambitionsuffering The lie is so vile, that even if it were in speaking well of godly things, it would take off something from God's grace; and Truth is so excellent, that if it praises but small things they become noble. Leonardo da Vinci speaking-wellgodlylying The mole has very small eyes and it always lives under ground; and it lives as long as it is in the dark but when it comes into the light it dies immediately, because it becomes known;--and so it is with lies. Leonardo da Vinci eyedarklying All our knowledge originates in opinion. Leonardo da Vinci opinion Every man at three years old is half his height Leonardo da Vinci heightmenyears Nature is full of infinite causes that have never occurred in experience. Leonardo da Vinci causesintelligentnature ... 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 Vinci naturespringtravel My body is not a tomb for animals. Leonardo da Vinci animal-rightsbodyanimal Given the cause nature produces the effect in the briefest manner that it can employ. Leonardo da Vinci producecausesnature When you look at a wall spotted with stains...you may discover a resemblance to various landscapes, beautiful with mountains, rivers, rocks, trees. Or again, you may see battles and figures in action, or strange faces and costumes, and an endless variety of objects which you could reduce to complete and well-drawn figures. Leonardo da Vinci wallrocksbeautiful That painter who has no doubts will achieve little. Leonardo da Vinci achievedoubtlittles Life well spent is long. Leonardo da Vinci inspirationallifelong Of the original phenomena, light is the most enthralling. Leonardo da Vinci originalslight I have discovered that a screw-shaped device such as this, if it is well made from starched linen, will rise in the air if turned quickly. Leonardo da Vinci aviationpredictionsair Nature varies the seed according to the variety of the things she desires to produce in the world. Leonardo da Vinci naturedesireworld Beyond a doubt truth bears the same relation to falsehood as light to darkness. Leonardo da Vinci intelligentlighttruth