Take it up with Jesus. It was He who make the statement “This is the work of God, that ye believe on him whom he hath sent.”
Yes, I have. We must obey all his words, not just a subset used to derive new doctrines. Do not ignore Revelation. It is the last book and corrected error in the holy catholic apostolic churches. He used "works" twelve times with the churches ( and I'm no even counting similar words like deeds, etc.).