Knowledge is represented in the mind as symbolic structures.
真相并不总是表面看起来那样，有时不知道反而更好。
The secret of joy in work is contained in one word - excellence. To know how to do something well is to enjoy it.
译文：命运中有的终究会有，命运里没有的就不要强求。赏析：面对错综复杂的社会，人应该积极进取，努力向前，但无奈的现实，总是不如意，有时我们也应放低姿态，学会自我安慰。
We don't stop playing because we grow old; we grow old because we stop playing.
We don't just extract oil; we extract potential for economic growth and development.