"Begotten, not made, consubstantial with the Father.”

From "Athanasius against the world." Well worth reading (but it may be behind a paywall):

Seventeen hundred years ago, in a.d. 325, the Roman Emperor Constantine invited all the bishops of the world to assemble at Nicaea, in modern-day Turkey. The Council of Nicaea rejected the heresy of Arius, who denied the divinity of Jesus Christ. It composed a creed that (with some additions) is recited around the world today. It also set in motion a wrestling match of church and state engaging each other in the halls of history down through the generations.

A popular notion of that history laments “the Constantinian Church.” By this account, the church lost its integrity in consorting with the emperor. It joined the establishment and ever since has tended to align with hierarchies of secular power.

Of course, there’s a measure of truth in this paradigm. Constantine played a large role at Nicaea, and the church has often suffered through entanglement with regimes. But the larger story of Nicaea presents a much different balance of facts. For 50 years after the council, the Roman State supported the Arian heretics and oppressed the orthodox faith. A few courageous bishops resisted, and the laity stood firm. That is the story of Saint Athanasius and the fight for the Nicene Creed. ....

Arius first announced his heresy around the year 318. He reasoned that the biblical concept “Son,” “begotten of the Father,” implies a beginning. Therefore, the Son is not eternal as God the Father is eternal. He was created out of nothing, different in nature from God, as we are. ....

Constantine utterly misunderstood the significance of the issue. Arius’s opponents perceived it clearly. If Christ is not God, the Good News loses force. Our redemption depends on God’s entry into the world and His self-sacrifice. If Christ were merely a creature adopted by the Father, or a demiurge projected into the world, Christianity would fade away among all the Gnostic and Neoplatonic sects of the Hellenistic era. .... (more)

John D. Hagen Jr., "Athanasius against the world," National Review, Sept. 18, 2025.