What are the Beliefs of Christianity and Core Doctrine? 5 Fundamental Beliefs You Should Know

The beliefs of Christianity refer to the mission statement; core/guiding principles, and truths that are unique to the Christian Faith.

These are values taught to young believers, and are expected to be rooted and grounded in. All these beliefs must also be sourced singularly from the scriptures and no place else. Consequently, we’ll highlight the beliefs of Christianity via the Scripture. We will also discuss some of the foundational doctrines of our faith.

1. Salvation in Jesus Christ Alone

The fundamental belief of the Christian Faith is that all men have sinned, and as such, are under the power and dominion of sin and death.

Subsequently, Jesus Christ the son of God came to serve as an atonement for our sins. That any one who beliefs in him should perish not but have eternal life.

It is important to note that Christian beliefs is solely on Christ.  In no other person can salvation be found. Jesus is the only way to come into the salvation.

That is why scripture state that;

This Jesus is the stone that was rejected by you, the builders, which has become the cornerstone. And there is salvation in no one else, for there is no other name under heaven given among men by which we must be saved.” ( Acts 4:11-12)

And another states that:

For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life( John 3:16).

The belief that Salvation is in Jesus alone is the basis of Christianity.

beliefs of christianity

2. Justification and forgiveness of sins

Another core doctrine and belief of the Christian Faith is that we are justified by faith and that only in Jesus Christ of we have the forgiveness of sins. Scriptures say that Christians are justified, such that at no point will they suffer the consequence of sin which is death. It as a result of this justification that the Bible body declares that there is therefore now no condemnation for those who are in Christ Jesus.

To be justified is to be declared guilt-free. No wonder scriptures say very expressly that:

Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. (Romans 5:1).

Another core belief of the Christianity is that we have been forgiveness by the sacrifice of Jesus. Provision have been made for all sins -past, present, future.

This is backed up by several scriptures. One of which is Ephesians where it states that:

In him, we have redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace, which he lavished upon us, in all wisdom and insight.

beliefs of christianity
The Holy Spirit symbolized as fire

 3. The Indwelling of the Holy Spirit

Another fundamental belief of Christianity is that at the ascension of Jesus Christ he sent forth the holy spirit, and that the at salvation the Holy Spirit indwells the believer. The Holy Spirit is referred to as the third person in Trinity and he was described by Jesus as a comforter and a teacher.

We believe that the Holy Spirit is the seal of our redemption and he is a proof of salvation and the readiness and committed nature of God to Christians. The Holy Spirit being present in the believer shows that God will indeed come back to give into us the redemption of the body.

One scripture that particularly talks about the indwelling of the Holy Spirit as a reality for every believer can also be found in Ephesians 1: 13 thus;

And you also were included in Christ when you heard the message of truth, the gospel of your salvation. When you believed, you were marked in him with a seal, the promised Holy Spirit. 

Another scripture that proves that the Holy Spirit is available to the believer today is found in John 14: 26 where Jesus stated expressly;

 But the Advocate, the Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you.

4. Faith Towards God 

Another fundamental doctrine in the Christian faith is that of Faith. Faith is very important in scriptures, as it is by faith that we are saved and it is by faith that we live out the Christian life. Many scriptures point out that Faith is needed to receive from God, to please God, among many other things when it comes to God.

beliefs of christianity
Faith towards God

Every believer is taught to have faith in God for provisions, protection, help, and Favour. We are taught that to experience the power of God we must step out in Faith on the promises on God. The doctrine of faith is evidenced in the following scriptures:

Matthew 21:22: And whatever you ask in prayer, you will receive, if you have faith.

Mark 11:22-24: And Jesus answered them, “Have faith in God. Truly, I say to you, whoever says to this mountain, ‘Be taken up and thrown into the sea,’ and does not doubt in his heart, but believes that what he says will come to pass, it will be done for him. Therefore I tell you, whatever you ask in prayer, believe that you have received it, and it will be yours.

5. Eternal Judgement

The final doctrine we will consider is that of eternal judgment for all men who reject the salvation of the lord and his provision for sin in Jesus Christ. The belief is that God must judge sin and any man that remains bound to the sinful nature will face the wrath of God against sin.

This belief is a fundamental part of the Christian faith and it is one reason that believers persuade men to come to God. Like paul put it: ”Knowing, therefore, the terror of the Lord, we persuade men ( 2 Corinthians 5:11).”


There are several other beliefs and doctrines that form the Christian religion. These are however some of the very fundamental ones, as seen from scriptures.