Was driving through the countryside today with some people who insisted upon frequent recourse to a roadmap in order to discover, as they put it, "Just where they were." Reflected that for my part I generally have a pretty shrewd idea of just where I am; I am enclosed in the somewhat vulnerable fortress which is my body, and from that uneasy stronghold I make such sorties as I deem advisable into the realm about me. These people seemed to think that whizzing through space in a car really altered the universe for them, but they were wrong; each one remained right in the centre of his private universe, which is the only field of knowledge of which he has any direct experience.

Samuel Marchbanks' Almanack (1967)