"But grow in grace, and in the knowledge of our Lord and Saviour Jesus Christ. To him be glory both now and for ever. Amen" (2 Peter 3:18)
Once the Holy Spirit's work in our heart begins, grace, forgiveness, cleansing take on a form of almost bodily clearness.
Prayer loses its unmeaning quality and becomes a sweet conversation with Someone actually there. Love for God and for the children of God takes possession of the soul. We feel ourselves near to heaven and it is now the earth and the world that begin to seem unreal.
Then the whole life changes to suit the new reality and the change is permanent. Slight fluctuations there may be like the rise and dip of the line on a graph, but the established direction is upward and the ground taken is held.
This is not all, but it will give a fair idea of what is meant when the New Testament speaks of "power", and perhaps by contrast we may learn how little of the power we enjoy.
In everything that belongs to the excellence of real religion, the true believer is in a state of progression. He seeks and strives, he wrestles and fights. He is ever aiming at the prize. His obedience, though not perfect, is habitual.
~A. W. Tozer~