月満つきみつれば則すなわち虧かく

expression

every tide has its ebb; fortune is fleeting

A classical proverb meaning that when something reaches its peak, it inevitably declines. Used to express the transience of prosperity or good fortune.

• 「月つき満みつれば則すなわち虧かく」という諺ことわざがある。

  There is a proverb: 'Every tide has its ebb.'