God has entered into time, he has come into the world he created. We are taught in the Scripture that there are three persons in the Godhead – this is a great mystery – Father, Son, and Holy Spirit, equally eternal, and God, and yet three distinct persons.
We should never think of the Son of God as subordinate except when he was on earth, because when he came into this world, in his state of humiliation to be our representative, he had to obey the law for us. He had to live a perfect righteous life as a man and that meant voluntarily subordinating himself to the Father. So yes in the Gospels, Christ often speaks as though God the Father is his superior but that is because he is voluntarily living a life of perfect obedience in order that his perfect righteousness can deserve heaven for all his people. But as the Son of God he is actually eternally equal with the Father as God in every way.