'Mighty' in the Bible

And what is the exceeding greatness of his power to us-ward who believe, according to the working of his mighty power,

May He grant you out of the riches of His glory, to be strengthened and spiritually energized with power through His Spirit in your inner self, [indwelling your innermost being and personality],

I pray that Christ may make His home in your hearts through your faith; so that having your roots deep and your foundations strong, in love, you may become mighty to grasp the idea,

Finally, be strong in the Lord, relying on his mighty strength.