Page 10 of the Big Book talks about a 'mighty purpose' underlying reality.
I have sometimes wondered what the purpose of life in general is, or the purpose of my life, or of some component thereof. I have ceased worrying about this. I have decided to trust God regarding what the purpose of any of these things is and focus instead on what God's will is for me today, right now, in terms of the right thought and action (page 87). I do not need to know the purpose in order to get on faithfully with what is in front of me to do.