句子由but连接两个分句，前半句陈述谨慎的益处，后半句转折指出其局限性，体现了辩证思维。
Disappointment is sometimes a kind of happiness. Because we have expectations, we get disappointed; because we love, we have expectations. So even if it is disappointing, it is still a kind of happiness, though this happiness hurts a little. — Zhang Xiaoxian
This is my favorite secret. The first secret to making yourself happy is to make others happy. The more you help others, the happier you become. Happiness comes not from selfishness but from altruism. What you sow is what you reap.
I believe a happy marriage requires the couple to maintain spiritual synchronization. Once a distance opens up between them, it becomes dangerous.
When you are alone, cooking a packet of instant noodles for yourself is also a kind of happiness!
Two people who stay together out of love are very happy. One person who stays together out of love while the other does not finds it exhausting. Two people who stay together without love find life plain.
Prudence keeps people safe, but it often does not make them happy.
失望有时也是一种幸福。因为有所期待，所以才会失望；因为有爱，才会有期待。所以纵使失望，也是一种幸福，虽然这种幸福有点痛。——张小娴
这是我最喜欢的一条秘诀。让自己幸福的第一秘方是让别人幸福。越是助人为乐就越快乐。幸福不是来自于自私而是无私。一分耕耘一分收获。
我觉得幸福的婚姻必定是夫妻保持精神的同步，一旦拉开距离，就很危险。
一个人的时候，为自己煮上一包方便面，也何尝不是种幸福！
两个因为爱在一起的人很幸福，只有一方因为爱而在一起的人很辛苦，两个都不因为爱而在一起的人很平淡。
审慎会使人安全，但往往不会幸福。