We must begin by acknowledging a hard truth. We will not eradicate violent conflict in our lifetimes. There will be times when nations, acting individually or in concert, will find the use of force not only necessary but morally justified.
He who is gracious to his lover under the impression that he is rich, and is disappointed of his gains because he turns out to be poor, is disgraced all the same: for he has done his best to show that he would give himself up to any one's "uses base" for the sake of money; but this is not honourable.
St. Francis of Assisi taught me that there is a wound in the Creation and that the greatest use we could make of our lives was to ask to be made a healer of it.
If I were to die today, I would have some concern for Tibet. But I know that I have personally done as much as I can to use my existence for others. So I have no regret.