How do I know that I have pride?

Answer

Pride exists in all people. Everyone is encumbered with an evil nafs. When you are insulted or criticized and you become angry, and are poised to vent your anger, then understand that your anger is the effect of pride. You are required to restrain your anger. Do not give vent to it. Repeatedly struggling against your nafs/ desire by suppressing it, will bring your pride under control. Read books of the Auliya. Read our kitaab, Shariat & Tasawwuf for a better understanding of the evil attributes of the nafs.