What if Christianity's most basic confession has been forgotten? Before councils, creeds, and centuries of theological debate, Israel confessed a simple and uncompromising truth: "Hear, O Israel: the LORD our God, the LORD is one." Jesus affirmed it. The apostles preached from it. The earliest Christian proclamation did not begin with abstract formulas about divine persons, but with the revelation that the one God of Israel had made himself known in Jesus Christ. The Forgotten Oneness calls readers back to that original monotheism. With careful attention to Scripture, Second Temple Jewish thought, the Memra traditions, John's Logos, Paul's Christology, Nicaea, and the early church debates, Jordan Goff argues that the biblical confession of one God was never meant to be redefined around multiple divine subjects. Father, Word, and Spirit are not separate centers of divine identity, but the one God revealing himself, speaking, acting, and finally dwelling bodily in Christ. This book is for pastors, students, theologians, and serious Bible readers who are ready to examine inherited assumptions and return to the foundation of biblical faith. Scholarly yet readable, bold yet deeply rooted in Scripture, The Forgotten Oneness offers a fresh and urgent defense of the apostolic confession: The Lord our God is one, and his name is Jesus.