How do we know the concept of the Trinity is true?

The truth of the Trinity is firmly rooted in Scripture, evidenced by the portrayal of the Father, Son, and Holy Spirit as distinct persons who each play significant roles in God's redemptive plan. For instance, passages like Matthew 28:19 and 2 Corinthians 13:14 showcase the three persons working together in unity, revealing their importance in the gospel narrative. Additionally, the use of the Trinity in the preaching of the gospel highlights that salvation encompasses the complete involvement of each person. The doctrine positions God as relational, underscoring that this unity among the three persons is essential for understanding the fullness of salvation.