The Bible is God inspired and His only perfect revelation of Himself to man.  thebible
2 Timothy 3:16 

 All Scripture is God-breathed and is useful for teaching, rebuking, correcting, and training in righteouseness.

There is only one living true God. He reveals Himself to us as the Father, Son & Holy Spirit.
1 Corinthians 8:6; Matthew 28:19

8:6 Yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.
28:19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,

Jesus Christ is the eternal Son of God, born to the Virgin Mary.
Matthew 1:23,25

23 “The virgin will conceive and give birth to a son, and they will call him Immanuel”[a] (which means “God with us”).
25 But he did not consummate their marriage until she gave birth to a son. And he gave him the name Jesus.

Salvation involves the redemption of man, and is offered freely to all who accept Jesus Christ as Lord and Savior.
Ephesians 2:8-10

Once saved, all are kept by God's power and are secure in Christ forever.
John 10:27-30

Christian baptism is the immersion of a believer in water. It is an act of obedience symbolizing the believer's faith in a crucified, buried, and risen Savior; the believers death to sin; the burial of the life; and the resurrection to walk in newness of life in Christ Jesus.
Acts 8:36,39

The Lord's Supper is a symbolic act of obedience whereby Christians memorialize the death of the Redeemer and anticipate His second coming.
1 Corinthians 11:23-26