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.