At the age of thirteen he had the chance to become king, but he refused. The rest of his life he spent trying to become a saint. He was always cheerful and friendly with everyone. He fasted, slept on the ground and prayed in the middle of the night. He loved to meditate of the Passion of Jesus, which is a good way of learning to love our God Who loves us so much. Casimir also loved the Blessed Virgin with a special love. In honor he loved to recite a beautiful hymn very often. We have a part of it in English and it is called, "Daily Daily, Sing to Mary."
Casimir was never too healthy, yet he was courageous and strong in character. He would always do what he knew was right. Sometimes he would even advise his father, the King, to rule the people fairly. He always did this with great respect, and his father would listen to him.
St. Casimir had a great love for virginity. Even though his parents found a very beautiful and virtuous young woman for him to marry, he chose to give his heart to God alone.
St. Casimir died when he was still very young.
Even if we are not too strong or healthy, we can still be strong in character. We can always stand up for what is right, but in a kind way.