台Taivo A Taiwan Mandarin dictionary

樂極生悲

lèjíshēngbēi

ㄌㄜˋ ㄐㄧˊ ㄕㄥㄅㄟ

Simplified 乐极生悲

1extreme joy turns to sorrow (idiom); Don't celebrate too soon, things could still go wrong!

Example

樂極生悲。

lèjíshēngbēi

Extreme joy begets sorrow.

Keep 樂極生悲 and it comes back until you know it.