Cross reference
1 Corinthians 4:20
20 For the kingdom of God is not in word, but in power.
1 Corinthians 2:4
4 And my speech and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power:
2 Corinthians 10:4-5
4 (for the weapons of our warfare are not of the flesh, but mighty before God to the casting down of strongholds),
5 casting down imaginations, and every high thing that is exalted against the knowledge of God, and bringing every thought into captivity to the obedience of Christ;
1 Thessalonians 1:5
5 how that our gospel came not unto you in word only, but also in power, and in the Holy Spirit, and `in' much assurance; even as ye know what manner of men we showed ourselves toward you for your sake.
Romans 14:17
17 for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit.
Romans 1:16
16 For I am not ashamed of the gospel: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
Romans 15:19
19 in the power of signs and wonders, in the power of the Holy Spirit; so that from Jerusalem, and round about even unto Illyricum, I have fully preached the gospel of Christ;
1 Corinthians 1:24
24 but unto them that are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.