God not only plays dice, He also sometimes throws the dice where they cannot be seen.
If I don't feel confident about my body, I'm not going to sit at home and feel sorry for myself and not do something about it. It's all about taking action and not being lazy. So you do the work, whether it's fitness or whatever. It's about getting up, motivating yourself and just doing it.
Novels attempt to render human experience; that's really all they are. They are meant to convey empathy for the character.

