快乐不应该是单一的、短暂的、完全依赖外部条件的,而应该是丰富的、持久的、能够靠自己创造的,否则结果仍是不快乐。所以,我的第二条指导思想是可持续的快乐。这是套用“可持续发展”一语,用在这里正合适。青春终究会消逝,如果只是及时行乐,毫不为今后考虑,倒真会“老大徒悲伤”了。为今后考虑,一方面是实际的考虑,例如,要有真本事,要有健康的身体,等等。另一方面,更重要 Happiness should not be single, short, completely dependent on external conditions, but should be rich, enduring, able to create on its own, otherwise the result is still unhappy. So, my second guiding principle is sustainable happiness. This is the phrase applied to “sustainable development”, which is right here. Youth will eventually disappear, if only in a timely manner, no consideration for the future, will be “old adults sad”. For future consideration, on the one hand is the practical consideration, for example, to have real ability, to have a healthy body, and so on. On the other hand, more important