He was one of the greats; a true master of nostalgia and wonder. I voraciously read everything he published; he added a layer of humanity to old SF, in a way that Azimov or Clarke couldn't match. Sad to see him go.
"You must live life at the top of your voice! At the top of your lungs shout and listen to the echoes."
"If we listened to our intellect, we'd never have a love affair. We'd never have a friendship. We'd never go into business, because we'd be cynical. Well, that's nonsense. You've got to jump off cliffs all the time and build your wings on the way down." ~
RIP, good sir.