expression, godan verb (-ru, irregular)
there is always someone better; greatness is comparative; there is always a bigger fish
Proverb reminding that no matter how skilled or accomplished one is, there is always someone superior. Often used humbly or to encourage perspective.
彼はクラスで一番だと思っていたが、上には上があると知った。
He thought he was the best in the class, but he learned that there is always someone better.
Since there is always a bigger fish, you must stay humble.