Everything that we do has a why. Whether this why was embedded in our subconscious through constantly reminding ourselves of it, or we simply adopted it as a philosophy of a sort is a question for another discussion.
The thing is, though, it is always present. A system of beliefs that drives us forward, urge to either do or avoid something, what lies in the back of our head when we go and do even the most rudimentary of tasks… Getting rid of the fancy talk, it all boils down to the why.