The Bible is the infallible Word of God and the authority for salvation and Christian living. (II Timothy 3:15-17 KJV).
The saving gospel is the good news that Jesus died for our sins, was buried, and rose again. We obey the gospel (II Thessalonians 1:8 KJV; I Peter 4:17 KJV) by repentance (death to sin), water baptism in the name of Jesus Christ (burial), and the baptism of the Holy Spirit with the initial sign of speaking in tongues as the Spirit gives the utterance (resurrection). (I Corinthians 15:1-4 KJV; Acts 2:4, 37-39 KJV; Romans 6:3-4 KJV).