The Isaiah 40 Foundation holds to the following essential doctrine:

We believe in one God, existing eternally in three persons: Father, Son and Holy Spirit.

We believe that our Lord Christ is fully man and fully God, the only begotten Son of the Father; that He was conceived by the Holy Spirit, born of the Virgin Mary, suffered, was crucified, died and was buried, and was raised physically from the dead. He ascended to the right hand of the Father and will come again in power and glory to judge the living and the dead.

We believe that our Lord and Saviour, Jesus Christ, through His incarnation, sacrificial death, glorious resurrection and sending the Holy Spirit, has broken the power of sin and death and restores us to communion with the Father, enabling us to live joyfully in the power of His risen life together with the whole body of Christian believers.

We believe that the Church, the Body of Jesus Christ, is formed of all those who know Him as their Saviour and Lord, who are grafted into that Body through Baptism by water and the Holy Spirit and nourished through the Eucharist and the Proclamation of the Word.

We believe that through the indwelling of the Holy Spirit our whole person - body, soul and spirit - is opened to the healing and transforming new life in Christ.

We believe the Scriptures of the Old and New Testaments are the inspired word of God to be used for the formulation of doctrine and reproof, correction and instruction in right living, so that everyone may be capable of demonstrating a victorious and joyful Christian witness.

We believe that the Eternal Life promised to us in the Scriptures commences when we are incorporated into Christ, and reaches its completion in the resurrection, when renewed totally in body, soul and spirit we enter fully into our inheritance as children of God.