And the brakes are the voluntary ganglia.

And the steering gear is my head.

And the right and left pedals are the right and left dynamics of the body, in some way corresponding to the sympathetic and voluntary division.
So that now I know more or less how my rider rides me, and from what centers controls me.

That is, I know the points of vital contact between my rider and my machine: between my invisible and my visible self.

I don't attempt to say what is my rider.