there is only one God, eternally existing in three persons: the Father, Son and Holy Spirit.
Genesis 1:1 | Deuteronomy 6:4 | Matthew 28:19 | John 10:30

in the deity of Christ John 10:33; His virgin birth Isaiah 7:14 | Matthew 1:23 | Luke 1:34-35; His sinless life Hebrews 4:15, 7:26; His miracles John 2:11; His vicarious and atoning death 1 Corinthians 15:3 | Ephesians 1:7 | Hebrews 2:9; His resurrection John 11:25 | 1 Corinthians 15:4; His ascension to the right hand of the Father Mark 16:19; and His personal return to earth in power and glory Acts 1:11 | Revelation 19:11-16.

in the necessity of regeneration by the Holy Spirit for salvation, and that all are justified by faith by the shed blood of Christ, and that only by God’s grace, through faith, are we saved. John 3:16-19 |  John 5:24 | Romans 3:23, 5:8-9 | Ephesians 2:8-10 | Titus 3:5

in the resurrection of both the saved and the lost; those who are saved unto the resurrection of life, and those who are not unto the resurrection of damnation. John 5:28-29

the baptism of the Holy Spirit is a subsequent experience to salvation and the gifts of the Spirit are essential for the individual believer and the church as a whole.
Acts 1:8

in the spiritual unity of the believers in our Lord Jesus Christ. Romans 8:9 | 1 Corinthians 12:12-13 | Galatians 3:26-28

that we as Christians are examples of the love of God in this world. It is this  love that we desire to possess and without which we have no right to call ourselves Christians. 1John 4:16-17