expression
pride goes before a fall; the proud do not endure
Proverb warning that arrogance leads to downfall. Literally refers to the historical Heike (Taira) clan, whose pride preceded their defeat.
See also: おごる平家久しからず
「驕る平家は久しからず」というように、成功しても謙虚さを忘れてはいけない。
As the saying goes, 'pride goes before a fall'; even when successful, you must not forget humility.
彼は調子に乗って失敗した。まさに驕る平家は久しからずだ。
He got carried away and failed. It's a perfect example of 'pride goes before a fall.'