Proverbs 17:19

He loveth transgression that loveth strife: and he that exalteth his gate seeketh destruction.

To love quarreling is to love wrongdoing itself, so delight in strife is not mere temper but delight in transgression. To lift up one's gate is to lift up oneself in prideful self-exaltation, seeking prominence and display. That prideful lifting up seeks ruin and moves toward destruction as its end.