“be filled with the Spirit” (Ephesians 5:18) is to be controlled by the Holy Spirit. This is a present continuous action and requires a believer to be (a) daily yielded to God, (b) daily in repentance with confession with godly sorrow, (c) daily allowing the word of God to richly indwell the inner man. Being controlled by the Holy Spirit empowers a believer (a) daily in spiritual battle (Spirit versus flesh) and, (b) daily in living out the person and character and conduct of Christ and in being obedient to the will of God.
How the Gospel Changes Us
We could search the universe high and low for the ultimate display of God’s power, exploring from the wonders of earth all the way to the largest galaxies. But all those things would fall short of showing the fullness of God’s power. If we want to see the greatest demonstration of the power of God, we will find it in the message of the Gospel, when a sinful man is forgiven, transformed and made completely righteous before a holy God. There is no greater power to be seen!