'Exerting' in the Bible

This is our [reason for] proud confidence: our conscience testifies that we have conducted ourselves in the world [in general], and especially toward you, with pure motives and godly sincerity, not in human wisdom, but in the grace of God [that is, His gracious lovingkindness that leads people to Christ and spiritual maturity].

who, by exerting that power which enables Him even to subject everything to Himself, will [not only] transform [but completely refashion] our earthly bodies so that they will be like His glorious resurrected body.