What is philosophy?, that is W.'s question. It's the question every philosopher has to ask, late in life.
What is philosophy? What have I been doing all along?: To answer these questions is to try to make sense of your struggles at last. To redeem them.
Ah, the life of a philosopher. Was it all worth it? Where has it led him? W. thinks of Rutger Hauer's great speech in Bladerunner:
I've seen things you people wouldn't believe. Attack ships off the shoulder of Orion. I watched c-beams glitter in the dark near Tannhauser Gate. All those moments will be lost in time, like tears, in rain. Time to die ...
Well, he's seen things too, W. says. Great things. That's what you can never explain to anyone.