Faith is an act of rational choice, which determines us to act as if certain things were true, and in the confident expectation that they will prove to be true.
I think it's imperative to follow your heart and choose a profession you're passionate about, and if you haven't found that 'spark' yet, if you're not sure what you want to do with your lives - be persistent until you do.
I'm waiting for the time when I fail - because we all fail - and I'm ready, I'll take up carpentry.

