Well its subjective as I cannot exactly say feelings. When I mean "insane" I just mean it feels that way as you are pushing yourself toward something without definitive proof or in some cases breaking completely new ground that relies on a lot of things working out of your control. Definitely can be interpreted many ways, I agree.
> You have to have faith that your grit will achieve those goals and pray to the gods of achievement everyday
Having faith, that your grit will achieve your goals is also sort of insane. It's irrational for sure. Whether you achieve a goal or not is out of your control. All you can and should do is to try your best.