It is a dogma of the Roman Church that the existence of God can be proved by natural reason. Now this dogma would make it impossible for me to be a R… - Ludwig Wittgenstein

"Tell me," Wittgenstein's asked a friend, "why do people always say, it was natural for man to assume that the sun went round the earth rather than that the earth was rotating?" His friend replied, "Well, obviously because it just looks as though the Sun is going round the Earth." Wittgenstein replied, "Well, what would it have looked like if it had looked as though the Earth was rotating?"

Es ist offenbar, dass auch eine von der wirklichen noch so verschieden gedachte Welt Etwas — eine Form — mit der wirklichen gemein haben muss.

Waltzing is not the same thing as dancing, since the rhumba is also a dance but it is not a waltz. It therefore follows that one can waltz without dancing the waltz.