Life;an old steam engine

Its like an old steam engine running along battered trails. Chugging, puffing and putting on all the efforts to run along. crossing dilapidated stations on its journey. Stop...rennovate..move ahead to come across another such station. When you think everything is smoothly running, you hear a clanking noise somewhere and notice yet another repair to be done. And, it continues till you reach your destination. The only difference is, in this journey, you are not aware of your destination. End could be round any corner..sudden...abrupt. Or the journey might be very long.