By Franciscan Media - Casimir, born of kings and in line to be a king himself, was filled with exceptional values and learning by a great teacher, John Dlugosz. Even his critics could not say that his conscientious objection indicated softness. As a teenager, Casimir lived a highly disciplined, even severe life, sleeping on the ground, spending a great part of the night in prayer and dedicating himself to lifelong celibacy.