盈则必亏
◎ 盈则必亏 yíngzébìkuī
[when the fullest extentis reached, waxing is necessarily followed by waning] 满盈之极,必有亏损
全则必缺,极则必反,盈则必亏。——《吕氏春秋·博志》
成语词典已有该词条：盈则必亏
