For, after all, how do we ...

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?
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?

Quotes from the same author

Serious sport has nothing to do with fair play. It is bound up with hatred, jealousy, boastfulness, disregard of all rules and sadistic pleasure in witnessing violence. In other words, it is war minus the shooting.
Happiness can exist only in acceptance.
Myths which are believed in tend to become true.
The ideal set up by the Party was something huge, terrible, and glittering-a world of steel and concrete, of monstrous machines and terrifying weapons-a nation of warriors and fanatics, marching forward in perfect unity, all thinking the same thoughts and shouting the same slogans, perpetually working, fighting, triumphing, persecuting-three hundred million people all with the same face.
Recently I was reading somewhere or other an Italian curio-dealer who attempted to sell a 17th century crucifix to J.P. Morgan. Inside it was concealed a stiletto. What a perfect symbol of the Christian religion.