There's actually a really easy to understand and universal point to life.

To reproduce

This would be the major one, following it we have eating, sleeping, pooping and other assorted bodily functions. Anything beyond that I'd attribute to our incredibly overactive brains and that pain in the ass of a question 'Why?'. That one has screwed over the majority of human history with people coming to a general consensus on what exactly the answer to 'why?' is and then being sure to thoroughly eradicate anyone with an opposing view point.

Personally I think "why?" is a horrible question and in no way fits with the answer of 42.