A sense is what has the power of receiving into itself the sensible forms of things without the matter, in the way in which a piece of wax takes on the impress of a signet-ring without the iron or gold.Aristotle
Things on a very small scale behave like nothing that you have any direct experience about. They do not behave like waves, they do not behave like particles, they do not behave like clouds, or billiard balls, or weights on springs, or like anything that you have ever seen.Richard Feynman
The evil that is in the world almost always comes of ignorance, and good intentions may do as much harm as malevolence if they lack understanding.Albert Camus
Occurrences in this domain are beyond the reach of exact prediction because of the variety of factors in operation, not because of any lack of order in nature.Albert Einstein
Just as we might take Darwin as an example of the normal extraverted thinking type, the normal introverted thinking type could be represented by Kant. The one speaks with facts, the other relies on the subjective factor. Darwin ranges over the wide field of objective reality, Kant restricts himself to a critique of knowledge.Carl Jung
It always seems odd to me that the fundamental laws of physics, when discovered, can appear in so many different forms that are not apparently identical at first, but, with a little mathematical fiddling, you can show the relationship.Richard Feynman
A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.Isaac Newton