God is a Trinity: Father, Son, and Holy Spirit; three persons in One, eternally co-existent and co-equal (Colossians 1:15,19; 2:9).

Jesus Christ is God from all eternity (Micah 5:2, John 1:1, 1 Timothy 3:16).
He came through the womb of a virgin, Mary (Isaiah 7:14, Matthew 1:23).
He died on the cross for our sins, was buried, and rose on the third day (1 Corinthians 15:3).
It was through the shedding of His blood that we are washed (Ephesians 1:7, Revelation 1:5).
He ascended to heaven and is coming again (John 14:3), first to take home His Church in a physical, bodily resurrection (1 Thessalonians 4:13-18, 2 Thessalonians 2:1-8, 1 Corinthians 15:51-52), and then to set up His kingdom on earth (Revelation 20:1-3).

We are all sinners in need of a savior (Romans 3:23).
Our sin is what kills us and condemns us to Hell (Romans 6:23).
We can be cleansed of our sin and have eternal life with God; He is faithful to forgive our sins (John 3:16; 1 John 1:9).
Jesus, the Son, is the only way to the Father in Heaven (John 14:6).
One must be born again to enter the kingdom of God (John 3:3).

The work of the Holy Spirit is to convict the world (John 16:8), and to give believers the power to witness (Acts 1:8) and to bear good fruit (Galatians 5:22-25). The Holy Spirit is sent from the Father to indwell all who would love Jesus (John 14:15-26).

We cannot get to Heaven by good works; salvation is completely by the grace of God (Ephesians 2:8-9).