After he was made a priest, John was sent out to preach. He and St. Bernardine of Siena spread devotion to the Holy Name of Jesus everywhere. John preached all over Europe for forty years, and all who heard his sermons were moved to love and serve Our Lord better.
The greatest moment in the life of this Saint came at the tremendous battle of Belgrade. The Turks had made up their minds to conquer all Europe and wipe out the Church of Jesus. The pope sent Saint John to all the Christian Kings of Europe to beg them to unite to fight the mighty Turkish army. The Kings obeyed this poor, barefoot monk who stirred up their love of God and their courage with his fiery words. But even though a big army of Christians came to fight Mohammed II and his Turks, it looked as though they would lose, for the enemy army was much bigger. Then it was that the Saint himself, though he was seventy years old, ran to the front lines and encouraged the men to keep fighting. Holding his crucifix up high, this thin small old man kept crying, "Victory, Jesus, victory!" and the Christian soldiers felt full of more courage than ever. They fought until the enemy ran away in great fear!
Just one person can do great things, if he is on God's side. Let us make up our mind always to be on Our Lord's side and stand up for what is right.