"Time" magazine editor Stengel, who collaborated with Mandela on his bestselling autobiography, distills Mandela's wisdom into 15 vital life lessons that have the power to deepen lives.

Courage is not the absence of fear -- Be measured -- Lead from the front -- Lead from the back -- Look the part -- Have a core principle -- See the good in others -- Know your enemy -- Keep your rivals close -- Know when to say no -- It's a long game -- Love makes the difference -- Quitting is leading too -- It's always both -- Find your own garden.