What is the main assertion of the Nicene Creed?

The main assertion of the Nicene Creed is that Jesus is of the same substance as the Father. This statement, expressed in the Latin phrase "consubstantialem Patri," underscores the belief in the divinity of Jesus Christ, affirming that He shares the same essence or nature as God the Father. This was a crucial point of contention in early Christian debates, particularly against the Arian view, which claimed that Jesus was a created being and not divine in nature. By emphasizing that Jesus and the Father are of one substance, the Nicene Creed firmly established the orthodox Christian belief in the Trinity, where the Father, Son, and Holy Spirit are distinct persons but of the same divine essence. This assertion is fundamental to Christian theology as it articulates the belief in the full divinity of Christ, a belief that is central to the faith and its understanding of salvation and the nature of God.