The Lessons from Mandela in Ubuntu leadership"As the years progress one increasingly realises the importance of friendship and human solidarity. And if a 90-year-old may offer some unsolicited advice on this occasion, it would be that you, irrespective of your age, should place human solidarity, the concern for the other, at the centre of the values by which you live." - Lecture in Kliptown, Soweto, July 12, 2008.