1. Physics looks for general principles for how nature works, such as Newton's laws of force, conservation of energy, and conservation of momentum. There aren't very many general principles in physics; I'd say less than 10 principles to summarize all of nature. All of science then is an exercise in applying these general principles to a wide variety of phenomena.

What are the general principles of the Christian faith? To be general, they should be fairly simple and always true. There also should not be very many general principles.

2. Some of the principles we have used in physics are easily applied in some situations, but not readily useful in other situations. For example, Newton's laws describe the motions of objects moving relatively slowly, but fast objects are better treated using special relativity. One assumption of science, sometimes called the "correspondence principle", is that principles in one realm should not contradict principles in another realm. In other words, the entire set of physical laws should be internally consistent. Is this assumption justified? Are there any philosophical or theological implications of the consistency of physical laws?