我们对现实的感知是由我们的期望和过去的经验塑造的。
Everything should be built top-down, except the first time.
Was vernünftig ist, das ist Wirklich; und was wirklich ist,das ist vernünftig.
The past is hidden somewhere outside the realm, beyond the reach of intellect, in some material object (in the sensation which that material object will give us) which we do not suspect.