The Old and New Testament is the Word of God; perfect and inspired by God Himself.
There is one God, who exists in three persons; Father, Son and Holy Spirit.
The Lord Jesus Christ, the Son of God, became man without ceasing to be God, in order that He might reveal God and redeem sinful men.
The Holy Spirit came to draw us to God, to show us our need for salvation and to regenerate, sanctify, comfort, and seal those who believe in Jesus Christ.
That man is totally corrupt and can do nothing on his own to change his lost condition. That salvation is the gift of God brought to man by grace and received by personal faith in the Lord Jesus Christ, whose atoning (reconciling, satisfying) blood was shed on the cross to redeem (to free from the consequences of sin, to win back) us through the forgiveness of sins.