Galileo discussing science:

“Philosophy is written in this grand book the universe, which stands continually open to our gaze…But the book cannot be understood unless one first learns to comprehend the language and to read the alphabet in which it is composed. It is written in the language of mathematics, and its characters are triangles, circles, and other geometric figures, without which it is humanly impossible to understand a single word of it. Galileo (1564-1642)”_

Feynman commenting on quantum theory:

I am going to tell you what nature behaves like. If you simply admit that maybe she does behave like this, you will find her a delightful, entrancing thing. Do not keep saying to yourself, if you can possibly avoid it, "But how can it be like that?" because you will get 'down the drain', into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that. (Richard Feynman, The Character of Physical Law, page 129).