Eph 4:6 describes four aspects of God the Father about "all", namely:
- He is the Father of all
- He is over/on all
- He is through all
- He is in all
This all-encompassing statement has been understood in various ways including:
- that God is the creator and sustainer of all things (Col 1:16, 17) and thus the source of biological life for all things
- that God is the source of spiritual life and regenerative life for all believers (1 John 5:11, 12)
What is the logical evidence?
The second is obviously true; BUT, for the second option to be true, it must also include the first precisely because no one can come to the Father unless the Father "draws" them (John 6:44, 12:32; see also Heb 7:19, 10:22, etc).
Thus, since God is the creator of all things and the sole source of spiritual life and transforming power to live the Christian life, and since God wants all people to be saved (1 Tim 2:4), the "all" must include all things and all people and all living creatures.
See also 1 Cor 15:28.
Indeed, when speaking to those at the Areopagus and a group of non-Christian pagans, Paul remarked (about all people) -
Acts 17:28 - ‘For in Him we live and move and have our being.’ As some
of your own poets have said, ‘We are His offspring.’
Thus, all are dependent on God for "life and breath and all else" (Acts 17:25 see also Isa 42:5) and thus, to this extent at least, God is in us all.