expression
to be content with small successes
Rare, literary expression meaning to settle for modest achievements instead of striving for greater things. Often used in a cautionary or critical tone.
小成に安んじることなく、さらなる高みを目指すべきだ。
You should aim higher without being content with small successes.
安んじる alone means 'to be content' or 'to be satisfied', but 小成に安んじる is a fixed phrase with a specific nuance of settling for minor achievements.
The expression combines 小成 (small achievement) with 安んじる (to be content). The exact historical origin is uncertain, but it reflects a classical Chinese-derived admonition against complacency.