When we look at how the Bible uses the word pride we see that pride is substituting our own authority, our plan, our greatness, our human goodness in place of God's. The proud person looks at himself differently than God looks at him.
Pride is mental attitude sin.
Satan thought that he was good enough to challenge God's authority and rule. He makes the mistake of taking credit for spiritual growth and ministry. 1 Cor 15.10 gives the right attitude. The believer does not conquer pride.