Duryodhana was extremely proud and arrogant. He never listened to wise advice from his elders and insulted Krishna when he came as a messenger of peace. His pride and envy ultimately led to his downfall and death, despite warnings about his demonic nature when he was born. The passage cautions that qualities like pride, arrogance, and envy destroy one's character and make one ignorant. It notes we all have both good and bad tendencies within us, and which one wins depends on which one we choose to feed or strengthen.