'Power of God' in the Bible

in [speaking] the word of truth, in the power of God; by the weapons of righteousness for the right hand [like holding the sword to attack] and for the left [like holding the shield to defend],

For even though He was crucified in weakness [yielding Himself], yet He lives [resurrected] by the power of God [His Father]. For we too are weak in Him [as He was humanly weak], yet we are alive and well [in fellowship] with Him because of the power of God directed toward you.