有人說，幸福是一種感覺，不知足永不會幸福，因此要學(xué)會“知足常樂”。

“知足常樂”，漢語成語，意思是知道滿足，就總是快樂（A man who is contented will be happy），形容對已經(jīng)取得的成就感到滿足并取得快樂。與英文諺語“a contented mind is a perpetual feast”意思相近，表示“If you are mentally at peace, you will always feel that you have enough of everything, and will not have to strive to get more”。

例句：

A: 莉蓮掙的錢不多，但她似乎一直很快樂。我想知道她是怎么做到的？
A: Lillian doesn't make very much money, but she seems to be happy all the time. I wonder how she manages that?

B: 知足常樂。
B: A contented mind is a perpetual feast.