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For, after all, how do we know that two and two make four? Or that the force of gravity works? Or that the past is unchangeable? If both the past and the external world exist only in the mind, and if the mind itself is controllable – what then?
Reality exists in the human mind, and nowhere else.
I am invisible, understand, simply because people refuse to see me.
Pray look better, Sir... those things yonder are no giants, but windmills.
Miguel de Cervantes,