As for Christianity’s core traditional doctrines, they are codified in several texts and contexts. They can be studied in a variety of documents. Expressed at its simplest, classical Christian faith is built on two important doctrines: a teaching about God; and about Jesus Christ. God is a free, benign, and powerful Creator of the universe. Over time, Christians developed a sophisticated Trinitarian doctrine about God.

Jesus

Jesus Christ

The main person in Christianity is Jesus Christ. As the Son of God, he came to earth to teach about love and fellowship. He represents the person that all Christians must strive to be. Christians believe that he is the only one that ever lived on earth that can be called perfect from all worldly sins.

The Doctrine of the Trinity

According to traditional Christian theology, God is triune. That is, God is a unity of three persons: Father, Son and Holy Spirit. The Father is God, the Son is God, and the Holy Spirit is God, but there are not three Gods, only one. According to the Athanasian Creed, the Father, the Son and the Holy Spirit are co-eternal and co-equal: none is before or after the other, and none is less or greater than the other. The doctrine of the Trinity is nowhere to be found explicitly in the Bible. There are multiple references to Father, Son or Logos (Word), and Spirit in the Bible. In other words, the Christian God has one substance and three persons (Father, Son and Holy Spirit).