Finally, my brethren, be strong in the Lord, and in the power of his might.
Note 1 at Eph 6:10: Paul told us how we may live victoriously in this present evil age (see note 9 at Ga 1:4) in spite of satanic opposition; it is through God's ability. We become victorious Christians when we live by the power of God's might. Our weaknesses are not an issue if we are drawing on the divine power of God. One of the greatest secrets of victorious Christian living is not just a "changed life" but an "exchanged life" (see note 15 at 1Co 1:30 and note 14 at Ga 2:20).