Obama’s tweet is actually part one of three; the first two have 1.2 and 1.1 million likes, respectively. They complete Mandela’s quote, saying “People must learn to hate, and if they can learn to hate, they can be taught to love. For love comes more naturally to the human heart than its opposite.” With Heather Heyer’s tragic Charlottesville death and the worst US racial strife in a while, it’s obviously a message that resonates.