One insightful brother works fixing things. He talked about how when you first come into a situation, the problem could be a thousand different things. What you want to do is figure out the simplest solution, and you need some understanding of the laws of physics in order to figure out what might be wrong and how to fix the problem.
The only way to solve the problem is to follow the laws that govern it.This can apply to many things in the gospel and in our lives as well.