In order for manís innermost organ to gain dominion over the soul and body and thus serve as channel for the life of the Spirit to be transmitted to others, there must be His strengthening. Paul prays for believers ďthat according to the riches of his glory he may grant you to be strengthened with might through his Spirit in the inner man [spirit]Ē (Eph. 3.16). He so prays because he considers it infinitely important. He asks God to strengthen by His Spirit their ďinner man,Ē which is the new man in them after they have trusted in the Lord. Therefore the prayer is that the believerís spirit may be strengthened by Godís Spirit.
From this we may deduce that the spirits of some saints are weak while those of others are strong. Whether they are potent or impotent depends upon whether or not they have received His strengthening. Since those at Ephesus had been sealed already with the Holy Spirit (1.13-14), the Apostleís prayer for them must be concerned with a gift other than His indwelling. His prayer indicates they must have not only the Holy Spirit indwelling them but also have His special power inundating their spirit so as to render their inner man strong. It is possible for us to possess a weak spirit although having God indwelling us.
To be filled with might in the inner man is the urgent need of Christians. However, unless they appreciate how feeble theirs is they will not ask for the invigoration of the Holy Spirit. Often the children of God cannot rise up to answer the Lordís call to service simply because, though their physical condition is good, their feelings are low, cold, and reluctant. Or even when their emotions are quite high, passionate, and willing, they find themselves unable to serve the Lord because now the body reacts lazily. Such phenomena betray the weakness of the spirit in its dominion over feeling and the physical body. The disciples found themselves in precisely that situation in the Garden of Gethsemane: ďthe spirit indeed is willing, but the flesh is weakĒ (Matt. 26.41). Willingness by itself is not sufficient; the spirit also must be strong. If it is sturdy it can overcome the infirmity [frailty, disability, lacking power] of the flesh [sin of the body and self of the soul]. Why do believers sometimes find themselves dragging and failing while laboring for souls? Lack of power in their spirit is the explanation. The same holds true in the case of environment. How easily we are affected by the confusion of the outside world. Were our spirits hardy we would be able to meet the most disturbing situation with peace and rest. Prayer is the acid test of the inner manís strength. A strong spirit is capable of praying much and praying with all perseverance until the answer comes. A weak one grows weary and fainthearted in the maintenance of praying. A vigorous spirit can move forward in the midst of adverse environment or feeling, but a frail one is impotent to stand against opposition. Great is the need of power in the spirit for spiritual warfare with Satan. Only those who have might in the inner man understand how to exercise their spiritual strength in resisting and attacking the enemy. Otherwise the battle will be make-believe, fought in the imagination of the mind or the excitement of the emotion, and perhaps fought with the weapons of flesh and blood.
In order for the inner man to be strengthened with power through the Holy Spirit, the children of God must discharge their responsibility. They need to yield specifically to the Lord, forsake every doubtful aspect in their life, be willing to obey fully Godís will, and believe through prayer that He will flood their spirit with His power. Without delay God will answer the expectation of their heart, once all obstacles on their part are removed. Believers do not need to wait for the Holy Spiritís filling, because He has descended already. What they need only wait for is for themselves to fulfill the condition for His filling, which is, they must let the cross perform a deeper incision upon them. Should they be faithful in believing and obeying, then within a very short time the power of the Holy Spirit will saturate their spirit and strengthen their inner man for living and for laboring. Some may receive His filling immediately upon once surrendering themselves to the Lord, for they already have met the conditions for such filling.
This invasion of Godís power in us, this infilling of His Spirit, happens in the human spirit. It is the inner and not the outer man which is activated by His power and thence becomes strong. This is most important to recognize, for it helps us to exercise simple faith in our desire for the filling of the Holy Spirit (Gal. 3.14), rather than to anticipate some bodily sensations such as a shaking, a jerking, or a hurling to the ground. Yet Christians need to be watchful lest they use faith as an excuse for not experiencing the empowering of the Holy Spirit. The conditions for filling must be accomplished and the attitude of believers must be firm. God will fulfill His promise.
By reading what the Apostle affirms in the succeeding verses in Ephesians 3 about apprehending, knowing, and filling, we are certain this strengthening with might in the inner man renders it highly sensitive. Like the body, the spirit has its functions and consciousness. Prior to the mighty inflow of the Holy Spiritís power into their spirit, believers scarcely can detect its intuitive power; but afterwards its intuitive force becomes most distinctive and hence readily discovered. As the inner man is energized, its intuitive power is increased. Believers are able to sense its slightest movement.
The effect of having the spirit filled with Godís power is to afford it full sway over the soul and the body. Every thought, desire, sensation and intent is now governed by the spirit. The soul can no longer act independently: it becomes instead the spiritís steward. Furthermore, through the believerís spirit the Holy Spirit is able to impart Godís life to thirsty and dying men. However, this filling of the Holy Spirit differs from the baptism with the Holy Spirit, because the latter is for the purpose of service while the former solves the problem of life (naturally it will affect service too).