Kent Gavin/Keystone/Getty Images

Perhaps, later today or two days or a week or a month from now, I'll have more to say about the life and the impact of Muhammad Ali. Right now, however, I have nothing besides shock and sadness. Not so much that he's dead. But that his death leaves humanity with such a gaping and reverberant void that I fear we'll never be able to fill it.

Muhammad Ali was alive for 74 years. He was the greatest. Is the greatest. Will continue to be the greatest.