[lè bù kě jí]   

乐    不    可    极    享乐不可过分。

享乐不可过分,否则乐极生悲。也比喻做事要有限度

One should not pursue pleasure to its extreme

乐道安命    乐变化天    乐不可支    乐尽悲来    乐道安贫