"History is not the past, it is the present. We carry our history with us."

解释：日月的光辉照亮了大地，可它们的内部仍然有黑点，人们谨慎地看待自己憎恶的人，而祸患常常发生在溺爱的人身上。

Efficiency is highly overrated； Goofing off is highly underrated. Regularly scheduled sabbaths， sabbaticals， vacations， breaks， aimless walks and time off are essential for top performance of any kind. The best work ethic requires a good rest ethic.

学习和思考的时间远远多于做事的时间，这种习惯绝非偶然。