Is the God of Ephesians 3 the same God revealed as Creator in Genesis 1?
Yes, Scripture identifies one and the same God in both passages. The mystery was hidden in the mind of God, who created all things by Jesus Christ, and the context explicitly states that the same God is in view in Ephesians 3 and Genesis 1.
Les explains that Ephesians 3:9 describes the mystery hidden from the beginning of the world in the mind of God, who created all things by Jesus Christ. He then directly concludes that the same God being discussed in Ephesians 3 is the God being discussed in Genesis 1. The context also notes that God keeps a secret until He is ready to reveal it, and when He reveals it, He expects mankind to believe it.
And to make all men see what is the fellowship of the mystery, which from the beginning of the world hath been hid in God, who created all things by Jesus Christ:
In the beginning God created the heaven and the earth.
More Questions
Who was Jesus of Nazareth in relation to the Creator God of Genesis 1?
Jesus of Nazareth was merely the manifestation in the flesh of the Creator God of Genesis 1.