One of the things I like about performing on the stage is that it is a kind of meditative experience. Time does stand still. You have no concept or feeling of the passing of two or three hours' time. It's all kind of one present moment, which is a kind of a description of meditation.
We write for the same reason that we walk, talk, climb mountains or swim the oceans - because we can. We have some impulse within us that makes us want to explain ourselves to other human beings.