Zephaniah 2:10 This they shall have for their pride, because they have reproached and made arrogant threats against the people of the Lord of hosts.
Pride is perhaps the most fundamental sin in Scripture. It was the sin that caused Lucifer, the Light Bringer, to err in regard to his position of importance as a created being, Isaiah 14:12-14. Being the greatest of the angelic hosts God created in the beginning, his wisdom was marred when he considered his position as the covering cherub, Ezekiel 28:14.