At the very core of Thornlie Christian College is the Christian faith. Following are the school's principles of faith:

The Godhead

We believe there is one God, eternally existing in three persons, Father, Son and Holy Spirit. Deut. 6:4, Is. 40:28, 2 Cor 13:14.

The Sovereignty of God

We believe that God, being sovereign, exercises supreme and absolute control over all creation and that the universe was created by the express Word of the Sovereign God, not by chance evolutionary processes. 1 Chron. 29:11,12, Dan. 4:35, Gen 1,2, Ps 33: 6, John 1:3.

The Holy Scriptures

We believe the Bible as originally written to be the inspired Word of God, authoritative and inerrant containing all that is necessary for salvation and setting absolute standards for every age and life such that no other authority is necessary. Ps 119, 2 Tim 3:16,17, 2 Peter 1: 20,21, Matt 5:18, John 16:12,13.

The Deity and Work of Christ

We believe in the Deity of our Lord Jesus Christ who, though being the eternal Son of God, humbled Himself and became man. He was conceived of the Holy Spirit and born to the virgin Mary so that He could reveal God and redeem sinful man. He accomplished our redemption and atonement by His sinless life and His sacrificial death on the cross as our representative and substitute. His bodily resurrection is the assurance that our salvation has been accomplished. He is now in heaven exalted at the right hand of God where He is our High Priest and advocate. We believe that He will return in power and glory to set up His Kingdom. John 1: 1,2,14,Philip 2:6-8, Luke 1:35, John 14:7, Rom 3:24,25, 1 Cor.15:3-8, Rom 4:25, 1 Pet. 1:3-5, Eph 1:20, Heb 4:15, 9:24, 7:25, Matt. 24:30,31, 25:31-34.

Satan

We believe that Satan is a real being. Throughout the Bible he is always shown to be hostile to God and man. His defeat has been accomplished by the sinless life, death and resurrection of Jesus Christ. Victory over Satan and his works will be complete at the end of the age. Gen 3: 1-6, Rev 12:9,10, Job 1:6,7, Matt 4:2-11, Is. 14:12-17, John 8:44, 1 Pet. 5:8, Acts 26:18, 1 John 3:8, Heb 4:15, 7:26, 2:14, Rom. 6: 8,9, Rev. 20:10.

The Lost State Of Man

We believe that man was created in the image of God, but through Satan's activity and Adam's subsequent sin, became alienated from God and is unable to regain his original condition by his own efforts. Gen. 1:26,27, 3:1-6, Rom 5:12, Eph 2:12, Rom 3:23, Is 64:6,7.

Salvation

We believe that salvation is the free gift of God, given to man by grace and received by personal faith in the Lord Jesus Christ. There is no other way to re-establish man's broken relationship with God. Eph. 2: 8-10, John 1:12, Eph. 1:7, Acts 4:12.

The Eternal Future

We believe in the resurrection of both the saved and the lost - those who are saved to eternal life in heaven and those who are lost to eternal damnation in hell. Luke 16:19-26, 23:43, 2 Cor 5:8, 2 Thess. 1:7-9. Rev. 20:11-15).

The Person and Work of the Holy Spirit

We believe that the Holy Spirit is a person, is God, and therefore possesses all the divine attributes. He convicts the world of sin, righteousness and judgement. He indwells believers when they accept Jesus Christ as Lord and Saviour, sealing them for the day of redemption. His work continues in the life of believers, to produce in them a Christ-like character. It is the task of the Holy Spirit to glorify Jesus and reveal his word. Gen 1:2, Acts 13:2, 2 Cor. 3:18, Rom. 8:9, 1 Cor. 6:17, Eph. 1:13,14, 1 Cor. 12: 12-14, Eph. 5:18, John 16:8-14, Eph. 4:30, Matt. 1:21.

The Church

We believe that the holy universal Church is made up of all born again believers. It is both a spiritual and physical body of which Jesus Christ is the head. Eph. 5:25,27, 1 Cor. 12:12-14, Eph. 1: 22,23.

Christian Education

We believe that learning for its own sake, or in isolation from a knowledge of God and His plan, is of limited value. It is the function of Christian education to encourage the search for truth in the context of God's sovereignty and His created universe. Eccl.1:18, 1 Cor.3:19, Eph. 6:4, Prov. 22:6, 9:9,10, 16:4, John 18:37, 17:17, 14:6.