[patatino]

The prefrontal cortex regulates the three challenges "I will not", "I will" and "I want". These three challenges cost energy everytime we make it.

That is what we call willpower. And almost everything you do needs willpower. Willpower doesn't only come in if you wan't to push further.

[kamaal]

We require energy to do anything. Even to just merely exist.

But that isn't all there is to, is it?