A friend of mine was once the organist at a cathedral with a grand pipe organ. He invited me to see it one day and hear him play, and for the finale he had me climb up into the forest of towering pedal pipes, crouching between the rows, dwarfed by their looming height, while he played Bach's Toccata and Fugue in D Minor.

The sound hit me like a wave, so vast and tremendous and perfect. I felt utterly annihilated - tiny and shaken apart into nothing, a speck swept away in a cascading ocean of music, like the whole world was exploding in cataclysm and fractal rebirth all around me. Dazzling and enormous.

And when the fugue peaked, I think that's the closest to nirvana I've ever been. Just blown clean off the face of the earth.