I've learned that courage and compassion are two sides of the same coin, and that every warrior, every humanitarian, every citizen is built to live with both. In fact, to win a war, to create peace, to save a life, or just to live a good life requires of us - of every one of us - that we be both good and strong.

I was worried that all the corners of the earth had been explored, all the great battles fought. The famous people on TV were athletes and actresses and singers. What did they stand for? I wondered: Had the time for heroes passed?

If people can live through genocide and retain compassion, if they can take strength in pain, if they are able, still, to laugh, then certainly we can learn something from them.

As warriors, as humanitarians, they've taught me that without courage, compassion falters, and that without compassion, courage has no direction.

Yet the basic fact remains: we live in a world marked by violence, and if we want to protect others, we sometimes have to be willing to fight.

The best definition I have ever heard of a vocation is that it's the place where your great joy meets the world's great need. We need all of you to find your vocation. To develop your joys, your passions, and to match them to the world's great needs.

Viktor Frankl, a Holocaust survivor and the author of Man's Search for Meaning, wrote that human beings create meaning in three ways: thought their work, though their relationships, and by how they choose to meet unavoidable suffering. Every life brings hardship and trial, and every life also offers deep possibilities for meaningful work and love... I've learned that courage and compassion are two sides of the same coin.