心靈研究必須基于生物學(xué)。
When we no longer have the power to change a situation, we are challenged to change ourselves.
譯文：假如讓青春年華虛度，到年老時(shí)只能悔恨不已。賞析：人生短暫，年華易逝，我們要珍惜每天的日子，不要蹉跎歲月。
To serve is beautiful, but only if it is done with joy and a whole heart and a free mind.
In the end, the value of a theory is not in its complexity, but in its ability to explain and predict.