He was amazing in his selfless altruism for others, recognising — just as did a Mahatma Gandhi or a Dalai Lama — that a true leader exists not for self-aggrandisement but for the sake of those he or she is leading. Sadly, his personal life was marked by tragedy. Sacrificing personal happiness for his people, prison separated him from his beloved wife, Winnie, and his children. He was deeply distressed that while Winnie was being hounded and persecuted by the police, and later became caught up in the machinations of people who surrounded her, he was forced to sit helpless in his cell, unable to intervene. While worrying about Winnie, and grieving for his mother, he lost his eldest son, Thembi, in a road accident.
Soon after his release my wife, Leah, and I invited Nelson and Winnie to our Soweto home for a traditional Xhosa meal. How he adored her: all the while they were with us, he followed her every movement like a doting puppy. Later, when it was clear their marriage was in trouble, I spent some time with him. He was devastated by the breakdown of their relationship — it is no exaggeration to say that he was a broken man after their divorce, and he entered the presidency a lonely figure.
It was all the more wonderful then when he and Graca Machel, the eponymous widow of Mozambique's founding president, Samora Machel, found love together. Madiba was transformed, as excited as a teenager in love, as she restored his happiness. She was a godsend. He showed a remarkable humility when I criticised him publicly for living with her without benefit of matrimony. Some heads of state would have excoriated me. Not this one. Soon afterwards I received an invitation to his wedding.
The world is a better place for Nelson Mandela. He showed in his own character, and inspired in others, many of God's attributes: goodness, compassion, a desire for justice, peace, forgiveness and reconciliation. He was not only an amazing gift to humankind, he made South Africans and Africans feel good about being who we are. He made us walk tall. God be praised.
Desmond Tutu is Anglican Archbishop Emeritus of Cape Town, the 1984 Nobel Peace laureate and, most recently, the recipient of a Mo Ibrahim Foundation Special Award and the 2013 Templeton Prize.