Pride comes/goes before a fall
Definition 1 of 1
Pro Tip 1/3Cultural Caution
Used in contexts where humility is valued and arrogance frowned upon, be mindful of cultural nuances. 
Despite his talents, he learned that pride comes before a fall when his teammates criticized his attitude.
Pro Tip 2/3Metaphorical Use
Understand it's usually metaphorical, referring to personal downfalls rather than literal falls. 
She boasted about her project non-stop, but pride goes before a fall, as her results were disappointing.
Pro Tip 3/3Negative Outcome
The phrase is never used to describe a positive outcome; it's a caution against negative consequences of pride. 
He never listened to advice, and soon his pride came before a fall, costing him his partnership.