悲伤不是线性的过程。它像波浪一样袭来，有时那些波浪会把你击倒。
解析：不要贪天之功，不要掩人之善。
The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.
The architecture of cognition constrains the forms of knowledge representation.
