Believers in Jesus Christ have a continuous battle in regards to the faith. There are nine faith principles that are fundamental to all believers in Jesus Christ. Sound doctrine means that teachings about God are directed for His glory. Sound doctrine has nine principles that are the basics for all believers in Jesus Christ. The nine principles are explained thoroughly to help believers understand the basics of the faith to deepen knowledge of God, Jesus, and the Holy Spirit so that the Word of God can be spread in the world.