..be baptized every one of you in the name of Jesus Christ for the remission of sins...--Acts 2:38

Doctrine

The Bible is the infallible (cannot be proved false) Word of God given to man.

There is one God
1st Timothy 2:5
For there is one God, and one mediator between God and men, the man Christ Jesus;

Jesus Christ is God come in the flesh
Titus 2:11-13
(11) For the grace of God hath appeared, bringing salvation to all men, (12) instructing us, to the intent that, denying ungodliness and worldly lusts, we should live soberly and righteously and godly in this present world; (13) looking for the blessed hope and appearing of the glory of the great God and our Saviour Jesus Christ;
John 1:1&14
(1) In the beginning was the Word, and the Word was with God, and the Word was God. (14) And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

A person must be born of the water and of the Spirit
John 3:5
Jesus answered, Verily, verily, I say unto thee, Except one be born of water and the Spirit, he cannot enter into the kingdom of God!

Our Foundation

And are built upon the foundation of the apostles and the prophets, Jesus Christ himself being the chief corner stone. --Eph. 2:20
For there are three that bear record in heaven, the Father, the Word and the Holy Ghost: and these three are one. --1 John 5:7