How do we know that God is one and true?

The belief in one living and true God is rooted in the clear teaching of Scripture, where numerous verses affirm God's singularity and sovereignty. For example, Deuteronomy 6:4 declares, 'Hear, O Israel: The LORD our God, the LORD is one.' Furthermore, Isaiah 45:22 calls all to look to God alone for salvation, reinforcing the truth that He is the only God worthy of worship. This conviction shapes the foundation of our faith, emphasizing God’s oneness and uniqueness in the divine Trinity, consisting of the Father, Son, and Holy Spirit, who are equal in nature and glory.