That is the essence of science: ask an impertinent question, and you are on the way to the pertinent answer. - Jacob Bronowski

Here is the ultimate hope of saving ourselves from extinction. We must learn to understand that the contents of all knowledge is empirical; that its test is whether it works; and we must learn to act on that understanding in the world as well as in the laboratory.

Nature is more subtle, more deeply intertwined and more strangely integrated than any of our pictures of her — than any of our errors. It is not merely that our pictures are not full enough; each of our pictures in the end turns out to be so basically mistaken that the marvel is that it worked at all.

To imagine means to make images and to move them about inside one's head in new arrangements.