What can we put our all into? What can we rely on? In my experience the only thing we can rely on in life is faith in Jesus. Everything else will fail you eventually.
This sentiment is expressed vividly when I follow sports. It's so easy for me to get all my hopes and dreams caught up in how well the seminoles do or how well the bears do.
When they lose at the end of the season it's over, there is no going back. That season is over. Unless you win the championship, the season ends in disappointment. There is only one champion at the end of the year.
With faith God will never fail you. He is unique in this way.