Búyào yīnwèi yìdiǎn chéngjiù jiù biàn de kuángwàng zìdà.
Don't become arrogant and conceited just because of a small achievement.
Tips
usage
狂妄 is strongly negative and implies reckless overconfidence. Often paired with 自大 as 狂妄自大 (arrogant and self-important). Compare with the milder 骄傲 (proud, which can be positive or negative).
