When granted many years of life, growing old in age is natural, but growing old with grace is a choice. Growing older with grace is possible for all who will set their hearts and minds on the Giver of grace, the Lord Jesus Christ.
A calling is you feel - you look out and see the need - maybe it's the need for the poor, to help poor people. Maybe it's the need to get involved in the race problem, as Martin Luther King was - felt called.
I still enjoy watching a batter successfully cross home plate, but nothing thrills me more than seeing the Holy Spirit at work in hearts as the Gospel is carried into stadiums, across the airwaves, and around the world.