There's the world's work to be done, and there are never enough citizens with determined hearts, courageous character, intelligent minds, and idealistic souls to do it. Yes, our world already has quite enough guns, political platitudes, arrogance, disingenuousness, self-interest, snobbishness, superficiality, war, and the certainty that God is on one side or the other. But it never has enough conscience, nor enough tolerance, idealism, justice, compassion, wisdom, humility, self-sacrifice for the greater good, integrity, courtesy, poetry, laughter, and generosity of substance and spirit. It is these elements that I urge you to carry into your careers, and remember that the great game of life is not about money; it is about doing your best to build the world anew.

We cannot afford to be color blind. We have to be color brave. We have to be willing, as teachers and parents and entrepreneurs and scientists, we have to be willing to have proactive conversations about race with honesty and understanding and courage, not because it's the right thing to do, but because it's the smart thing to do, because our businesses and our products and our science, our research, all of that will be better with greater diversity.

Why is it that countries which we call strong are so powerful in creating wars but are so weak in bringing peace? Why is it that giving guns is so easy but giving books is so hard? Why is it, why is it that making tanks is so easy, but building schools is so hard?

In the course of history, there comes a time when humanity is called to shift to a new level of consciousness, to reach a higher moral ground. A time when we have to shed our fear and give hope to each other. That time is now.

Of the sweets of adversity, and let me say that these are not numerous, I have found the sweetest, the most precious of all, is the lesson I learnt on the value of kindness.

Even if we do not achieve perfect peace on earth, because perfect peace is not of this earth, common endeavours to gain peace will unite individuals and nations in trust and friendship and help to make our human community safer and kinder.

Long years ago, sometimes it seems many lives ago, I was at Oxford listening to the radio programme Desert Island Discs with my young son Alexander. It was a well-known programme (for all I know it still continues) on which famous people from all walks of life were invited to talk about the eight discs, the one book beside the bible and the complete works of Shakespeare, and the one luxury item they would wish to have with them were they to be marooned on a desert island.

It is in human nature to contain both the positive and the negative. However, it is also within human capability to work to reinforce the positive and to minimize or neutralize the negative.

To be forgotten too is to die a little. It is to lose some of the links that anchor us to the rest of humanity.

If I advocate cautious optimism it is not because I do not have faith in the future but because I do not want to encourage blind faith.