He exchanged the weapons of the military for the cross of Christ. It is said that he had a powerful experience where he encountered Jesus when he met a poor man and cut his cape in two, giving half to the poor man to cover himself from the cold. That night Jesus appeared to him wearing the half of his cape that he had given away.
How much of what you have would you be willing to put in the service of others? Are you willing to give up even what you need?