It is human nature to become consumed by our own life events. We forget our calling to suffer beside others when we are experiencing joy. We forget the command to rejoice with others even in times we are facing difficulties.
We are selfish, foolish creatures who do not remember that God has made us for more than these incessant worries and small triumphs. We are told to lose our lives in His. And we can measure how close we are to this goal based on what percentage of the day we are thinking only of things that affect ourselves.