All our knowledge hast its origins in our perceptions … In nature there is no effect without a cause … Experience never errs; it is only your judgmen… - Leonardo da Vinci

All our knowledge has its origin in our perceptions

All our knowledge has its origins in our perceptions.

All our knowledge has its origin in our perceptions.

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.

Science, knowledge of the things that are possible present and past; prescience, knowledge of the things which may come to pass.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

I find that any luminous body when seen through a dense and thick mist diminishes in proportion to its distance from the eye. Thus it is with the sun by day, as well as the moon and the other eternal lights by night. And when the air is clear, these luminaries appear larger in proportion as they are farther from the eye.

Întrucât nu poți face ce doreşti, doreşte-ți ceea ce poți face.