How do we know that the doctrine of the Trinity is true?

The doctrine of the Trinity is a foundational aspect of Christian theology, articulated in passages like Ephesians 4:4-6, where Paul presents the unity of one body and one Spirit, as well as one Lord and one God. This indicates that the Father, Son, and Holy Spirit are distinct persons yet one in essence, coexisting in harmonious relation. John 17 further illustrates this unity in Christ's prayer for the oneness of believers in a manner analogous to His unity with the Father. Furthermore, the nature of God is revealed through the redemptive work of Christ and the indwelling presence of the Holy Spirit, both of which affirm the truth of His triune nature. Believers can trust the historic creeds and biblical texts that have articulated this doctrine over centuries, confirming its richness and depth in God's revelation.