Authors:

They say that none of us exists, except in the imagination of his fellows, other than as an intangible, invisible mentality.

Edgar Rice Burroughs (2015). “The Complete Science Fiction Novels of Edgar Rice Burroughs (Illustrated): A Princess of Mars, Llana of Gathol, The Gods of Mars, Beyond Thirty, The Warlord of Mars, The Chessmen of Mars, The Master Mind of Mars, Pirates of Venus, The Monster Men and many more”, p.486, e-artnow
They say that none of us exists, except in the imagination of his fellows, other than as an intangible, invisible mentality.