You must have faith in yourself and once you start trusting and having faith in yourself is when everything changes.

I'm starting to see that more and more, yes. So much of the way life plays out is directly related to how you view yourself, and how you feel. Seems to me if one's able to master that, they're pretty much set. :)

It was soul-killing though because I was so bored and not being challenged in any way.

Makes sense. I don't think it'd need to be super difficult to be soul-killing. Rather, I'd say the term applies to anything that causes you to stagnate.