Ephesians 3:16

That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man;

According to - i:e., in abundance, consonant to the riches of His glory; not "according to" the narrowness of our hearts (Ephesians 1:7; Ephesians 2:7). Colossians 1:11, "strengthened with all might according to His glorious power."

By - Greek, 'through His Spirit.'

In, [ eis (G1519)] - 'infused into.'

The inner man (2 Corinthians 4:16; Ephesians 4:22; Ephesians 4:24; 1 Peter 3:4). Not predicated of unbelievers, whose inward and outward man alike are carnal. But in believers, the "inner (new) man," their true self, the sphere of regeneration (Ephesians 4:24; Colossians 3:10), stands in contrast to their old man, attached to them as a body of death daily being mortified, not their true self. The spirit [ pneuma (G4151)] is our highest part, linking us to God, the great Spirit; the soul [ psuchee (G5590)] is intermediate between the body (with which it is connected by the animal affections) and the spirit (with which it is connected by the [ nous (G3563)] intellect, thought).