The more difficult the victory, the greater the happiness in winning.

生命周期假说认为，个人会在一生中规划其消费和储蓄行为。

"Psychology must focus on the utility of mental operations."

人体是与政治和社会问题互动的最直接方式。

Sometimes you have to play a long time to be able to play like yourself.

Deep into that darkness peering, long I stood there wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before.

勇敢是美德之首。