Bottom up thinkers try to start from experience and move from experience to understanding. They don't start with certain general principles they think beforehand are likely to be true; they just hope to find out what reality is like.
John PolkinghorneTheology differs from science in many respects, because of its different subject matter, a personal God who cannot be put to the test in the way that the impersonal physical world can be subjected to experimental enquiry. Yet science and theology have this in common, that each can be, and should be defended as being investigations of what is, the search for increasing verisimilitude in our understanding of reality.
John PolkinghorneIf the experience of science teaches anything, it's that the world is very strange and surprising. The many revolutions in science have certainly shown that.
John Polkinghorne