A general rule of life and the universe. Can be summed up as such: Too much of anything good is bad. And vice versa.

An example would be: Too much kindness is rude. Also, Living indefinately is a fate worse than death. I suppose it is really a theory, since its inverse may not be true.

This is somewhat related to everything being a cycle with no begining or end. The theory can be represented by a circle bisected by a ray. Everything clockwise may be good, and everything counter-clockwise bay be bad. At a certain point, good becomes bad.