Fallen cold and dead: O Captain! My Captain! Robin Williams

Daily Mail: In deep depression and beset by money-worries, Robin Williams cut wrist and hanged himself as unwitting wife slept in another room

Albert Camus, 'The Myth of Sisyphus and Other Essays', 1942/1955:

"There is but one truly serious philosophical problem, and that is suicide. Judging whether life is or is not worth living amounts to answering the fundamental question of philosophy. All the rest—whether or not the world has three dimensions, whether the mind has nine or twelve categories—comes afterwards. These are games; one must first answer."
 
John Keating, played by the late Robin Williams in 'Dead Poets Society', 1989:

"We don't read and write poetry because it's cute. We read and write poetry because we are members of the human race And the human race is filled with passion. And medicine, law, business, engineering, these are noble pursuits and necessary to sustain life. But poetry, beauty, romance, love, these are what we stay alive for. To quote from Whitman, "O me! O life!... of the questions of these recurring; of the endless trains of the faithless... of cities filled with the foolish; what good amid these, O me, O life?" Answer: that you are here; that life exists, and identity; that the powerful play goes on and you may contribute a verse; that the powerful play goes on and you may contribute a verse. What will your verse be?"

Tom Hanks via FB:

"Let's remember the fiery genius, the long, long strings of laughter, the awe at the energy and the performances that lit up the room, the screen, the world. Let's remember Robin Williams. Hanx"

Woody Allen, 'Crimes and Misdemeanors', 1989:

"Where I grew up... in Brooklyn, nobody committed suicide... you know, everyone was too unhappy."

Looks like Mr. Williams was happy. 

I adore Robin Williams in quite a few of his films and have watched them multiple times but I particularly love him in Patch Adams (1996) and Dead Poets Society (1989).

They are scathing commentary on our education system, apart from many other things like parenting, medical care etc.

Stills from 'Dead Poets Society', 1989

courtesy: the copyright owner of the film / Touchstone Pictures