The church of God believes in Jesus Christ. Not just in his person but also in his purpose.
Matt. 1.21 says, "...he shall save his people from their sins." God's plan of salvation exists to change individuals - real people like you and me - from servants of sin to servants of right and good. It's more than a theory. It's more than theology. It is a reality. And you can attain it through the power of God.
This change was made possible by the self-sacrifice of Jesus Christ. Anyone who accepts God's plan will become a holy person thereby bringing to life the scripture, "Be ye holy, for I am holy." (1 Peter 1.16)