The gospel is "the power of God" as it is His Creative Command when He saves a person. When God saves a person, the gospel does not come in "word only" but "IN POWER and IN THE SPIRIT" (1 Thes. 1:4-5): 4 Knowing, brethren beloved, your election of God. 5 For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake. Those chosen from the beginning by God TO salvation are chose THROUGH sanctification AND belief of the truth in the effectual call through the gospel by the Spirit of God: 2 Thes. 2:13 ¶ But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth: 14 Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ. The power of Satan over the elect is broken when this command by God through the gospel occurs: 2 Cor. 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.....6 For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ. The gospel is the "word of truth" by which we are Born again by the expressed will/command of God: James 1:18 Of his own will begat he us with the word of truth, that we should be a kind of firstfruits of his creatures. James 1:23 Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever. 24 ¶ For all flesh is as grass, and all the glory of man as the flower of grass. The grass withereth, and the flower thereof falleth away: 25 But the word of the Lord endureth for ever. And this is the word which by the gospel is preached unto you. When God saves a person, The gospel becomes His creative Word of command , thus the gospel becomes "the power of God to salvation" as that creative word of command gives GOSPEL seeing eyes and GOSPEL hearing ears or a NEW heart.