The Nicene Creed, formulated at the Council of Nicaea in 325 AD, is a foundational statement of Christian faith, affirming the Trinity and the full divinity of Christ. It was written to refute the Arian heresy, declaring that the Son is "of the same substance" as the Father. For over 1,700 years, it has united believers across traditions, safeguarded orthodox theology, and provided a clear confession of faith. Today, the creed remains essential for defending biblical doctrine, fostering church unity, and grounding Christians in the unchanging truth of the gospel.