I think we find our purpose in our values. What matters to you?
It's been a while since I read Victor Frankl's book "Man's Search For Meaning". What I recall having read - or perhaps what I inferred from it - was that life's meaning was different for different individuals. While in Nazi labor camps, Frankl would coursel fellow prisoners who were giving up hope, and he would try to find meaning in life for that particular prisoner. It was typically something different for each individual. Reconnecting with what gave the prisoner's life meaning gave him the will to keep enduring their circunstance.