True believers are those who worship the One Eternal Creator, and are disciples of His Son. They worship their Father who sits above the heavens and serve His Son who manifests Himself through the various Messengers sent by His Father.
A true believer is required to faithfully believe the truth, have faith in the revealed messages of this day, and diligently follow certain customs and traditions that are given down to the greater assembly of truth, known as the Remnant. Those are your duties. It is the United Covenant that is to be taught to all the believers in your household.