Be careful with trying to define Yeshua (Jesus) as well as His Father. We can only understand what is revealed. The context of John 1 as well as much of John gives us understanding.
Is human nature sinful? If so then how can human nature and God's nature be combined. This goes to the very core difference between the theology of the West and the East...
As with the Trinity, there is a co-equality as well as an order of procession.
As with the term "Mother of God" would be heretical as well as blasphemous without understanding its context...