One of the recurring thoughts I have is this: Why do people behave in a certain way with themselves when they are sick and then differently when they feel good?

When they are sick, they take more care of themselves, they pay more attention to what they eat, and they rest more.

But when they feel good again, most of that good behavior vanishes.

If this happened once per lifetime I would be capable of understanding this situation better. But in most cases, the leading cause of suffering for a person is its bad habits. So after applying some temporary fixes, returning to those bad habits doesn't seem quite logical. Even more so when this repeats itself multiple times in a lifetime.

Note that this has happened to me as well. And probably, for some things, it still does, but I am on a journey to change that.