Life is a meaningless interruption into what would otherwise be a peaceful non--existence.
Biologically speaking, everyone's purpose is to procreate, thus keeping their species going. As my high school Biology teacher explained: If you do not have children, at some point in your life, you're already dead, at birth. That disturbed many students, greatly, but was totally on the money. (Good old Mrs. Coleman.)
My purpose in life, other than the above, is to keep myself reasonably busy with this and that, so I don't have too much time to ponder the meaningless nature of it all.