Charles Spurgeon Commentary Ephesians 6:10-11

"Finally, be strong in the Lord, and in the strength of his might. Put on the whole armor of God, that ye may be able to stand against the wiles of the devil." — Ephesians 6:10-11 (ASV)

And in the power of his might. Put on the whole armor of God,

First, be strong, and then put on armor. It is no use putting armor on a weak man, or else it will be what James said it was – a capital invention, He said, because he who wore it would come to no harm, and certainly do no harm, for he could not stir in it. Now you must be strong first, but then not trust in your strength, but put on the armor which is here described. And yet it would be useless to have the armor unless you are first strong. Put on the whole armor of God.