Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.
Leonardo da VinciWe know more about the movement of celestial bodies than about the soil underfoot.
Leonardo da VinciOne painter ought never to imitate the manner of any other; because in that case he cannot be called the child of nature, but the grandchild. It is always best to have recourse to nature, which is replete with such abundance of objects, than to the productions of other masters, who learnt everything from her.
Leonardo da VinciA bird maintains itself in the air by imperceptible balancing, when near to the mountains or lofty ocean crags; it does this by means of the curves of the winds which as they strike against these projections, being forced to preserve their first impetus bend their straight course towards the sky with divers revolutions, at the beginning of which the birds come to a stop with their wings open, receiving underneath themselves the continual buffetings of the reflex courses of the winds.
Leonardo da Vinci