One major fact we cannot deny is that we cannot choose how God will work. It is not our will that He carries out, but quite the opposite. If this is true, then the only way the Holy Spirit can truly be the power source of the church is when we step back on the day’s program, and invite Him to come among us and do His will. Isn’t this what we truly want?
So then, a healthy church is identified by current examples of lives being changed. Only the Spirit of God brings about true change, so if change is happening, the Spirit must be moving. And, if the Spirit is moving, we can assume He is pleased with our body of believers, and is free to work among us.
The truth of scripture is spiritually discerned, and discernment brings wisdom and change. What a testimony of spiritual health to see lives changed!
What the should we watch for? We should expect the alcoholic to be set free from addiction. The one who is drawn to pornography should suddenly find the strength to dispose of this habit. The marriage that is in ruins can be restored, if both sides are in a true relationship with Christ. Victims will become overcomers. The heart of the greedy will become generous and giving. The trouble-maker will become the peace-maker. The desires of our hearts will become the desires of God's heart.
These are the changes that a genuine relationship with Jesus Christ will bring, because He gives us His Spirit to dwell in us.
"You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ." - Rom. 8:9
"Therefore, brothers, we have an obligation--but it is not to the sinful nature, to live according to it. For if you live according to the sinful nature, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live, because those who are led by the Spirit of God are sons of God." - Rom. 8:12-14