There is a conceptual leap one needs to make.
A human is a human, yet take away their hand, is their hand less than them or just a part of the whole, and is the remainder less than the whole, and cannot be defined as them. The connection between parts of the body and the whole do not devalue the identity or each part, they are still part of the whole.
So every aspect of God is still God, though part of the whole, but not all of it. This is the problem with talking about the eternal, not created. Compartmentalisation does not diminish the whole or negate it. So Jesus can be God, but not the whole as the Father is, but still part and yet separate. Equally the idea of the same essence in two beings, together yet apart is hard for us to comprehend, because we do not experience it in life. But the Holy Spirit is unique, giving communion with the Lord through Him, yet Jesus and the Father do not have this kind of communion.
Jesus talks about His word indwelling us, and in a sense that is Jesus within us. This makes language difficult between being aligned in thought and deed with another, but not actually being indwelt by the other.
John the Baptist was indwelt by the Holy Spirit from conception and is deemed least in the Kingdom, because he did not choose this, but was indwelt from the start. Jesus exalts the difference between being alone and in rejection to communion and being indwelt. So I stand as a student listening and sharing what Jesus says. God bless you