Robin Williams, Dead at 63

Comedian Robin Williams, who will star in "The World According to Garp," is shown, July 21, 1982, in Los Angeles. (AP Photo)

Depression is something so profound it transcends being a comedian (or even happiness itself). It may even be correlated with the profession. But hearing that a Robin Williams took his own life does make you step back for a moment and ponder the entirety of the human enterprise.