Leonardo da Vinci

"Science is the observation of things possible, whether present or past; prescience is the knowledge of things which may come to pass, though but slowly."

"I myself have proved it to be of no small use, when in bed in the dark, to recall in fancy the external details of forms previously studied, or other noteworthy things conceived by subtle speculation;…"

"The eye can best distinguish the forms of objects when it is placed between the shaded and the illuminated parts."

"Every quantity is intellectually conceivable as infinitely divisible."

"Just as courage imperils life, fear protects it."

"All objects project their whole image and likeness, diffused and mingled in the whole of the atmosphere, opposite to themselves. The image of every point of the bodily surface, exists in every part of…"

"All the elements will be seen mixed together in a great whirling mass, now borne towards the centre of the world, now towards the sky; and now furiously rushing from the South towards the frozen North…"

"Of the horse I will say nothing because I know the times."