1 Thessalonians 1:5 (KJV); 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.
The Word and power of God are always consonant. Wherever the Word of God is, there is power.
Its one thing for us to have service every day, to speak many things that sound politically correct, yet they only appeal to the minds of men without necessarily manifesting the power of Jesus. But this is being seen a lot in the church of Jesus Christ were a lot of Christians and the church are so powerless.
When we study the scriptures we see that every time Jesus gathered men and taught, the power of God was always present to vindicate the Word that He spoke. In all his miracles we see him just saying a word and its made manifest with him having to fast or go to the prayer mountain.
The Bible says that, His word was with power. (Luke 4:32)
That is why there must be a correlation between the Word that we preach and the power that we demonstrate so that men might believe on Him. The prophets, teachers, apostles, pastors, evangelists and bishops ought to manifest that power in the word of Jesus Christ
Paul the Apostle says, "For I will not dare to speak of any of those things which Christ hath not wrought by me, to make the Gentiles obedient, by word and deed. Through mighty signs and wonders, by the power of the Spirit of God; so that from Jerusalem, and round about unto Illyricum, I have fully preached the gospel of Christ." (Romans 15:18-19).
Paul also tells us in the book of 1cor that he manifested the power of God.
1 Corinthians 2:4 And my speech and my preaching [was] not with enticing words of man's wisdom, but in demonstration of the Spirit and of power:
That is what it means to preach the gospel fully.
The essence of preaching the gospel fully is that if one carries the Word of God in ones spirit, then it must produce results because there are people you may never preach the gospel to until you MANIFEST Christ.
That means that your ministry, business, family, and everything in your life must be proven by both the Word of God coming out of your spirit, and the power that you demonstrate. Hallelujah!
Ecclesiastes 8:4 Where the word of a king [is, there is] power: and who may say unto him, What doest thou?