Why should Christians care about the doctrine of the Trinity?

The doctrine of the Trinity teaches that there is one God in three distinct persons: Father, Son, and Holy Spirit. This doctrine is vital for understanding the nature of God and His relationship with humanity. As the sermon notes, the fullness of God is revealed through each person of the Trinity, particularly in the ministry of Jesus Christ and the work of the Holy Spirit. Recognizing God as Triune helps Christians grasp the depth of their salvation, as Jesus’ dual nature as both fully God and fully man illustrates God’s commitment to redeeming His people. The Trinity must be defended against distortions, as it is central to who God is and how He interacts with the world.