1. Impartation
One of the most important aspects of the blessed work of the Holy Spirit is His work of indwelling the believer. The fact of His indwelling is realized by faith. (Rom. 8:9; 1 Cor. 6:19; 1 Cor. 3:16) This is fulfillment of our Lord’s promise. (John 14:16-18) God's Word declares the fact and we accept it as a fact by faith.

2. The impact of the indwelling of the Holy Spirit is realized by experience.
God’s Witness to our salvation (Rom. 8:15,16; Acts 9:31)
God’s Word – The Holy Spirit is the Spirit of Truth (John 14:17; 15:26; 16:13) The Holy Spirit makes it possible for us to understand the Bible (1 Cor. 2:14-16; 1 John 2:20,27).
God’s Will is communicated by the Holy Spirit (Rom. 8:14)

3. God’s Worship is enable by the Holy Spirit (John 4:24) as is believing prayer (Rom. 8:26,27)
God’s Work is empowered by the Holy Spirit (Phi. 2:13)

4. Verification
A guarantee is only as good as the guarantor. Humanly, there are times when the guarantor finds himself unable to fulfill his bond and must therefore forfeit the bond as a penalty. This is never the case with God, primarily because there is never a circumstance in which God is beyond His ability. God never promises anything that He cannot or will not deliver.

5. Sealing Transpires at Conversion (Eph
Sealing Transpires at Conversion (Eph. 1:12,13) 2 Corinthians 1:21,22 gives a list of three of those works of the Holy Spirit all of which occur simultaneously. “Now he which stablisheth us with you in Christ, {the baptism of the Holy Spirit} and hath anointed us, {the indwelling of the Holy Spirit} is God. Who hath sealed us, and given the earnest of the Spirit in our hearts. {the sealing of the Holy Spirit}”
Sealing Transfers Possession – Before conversion every man is a child of the devil. (John 8:44) Satan, who is the god of this world (2 Cor. 4:4), claims every lost man for his own.

6. When a man is born again he is no longer a child of the devil but becomes a son of God. The Holy Spirit marks the transfer of that ownership by His divine presence in the body of the new believer.
The word "seal" is a term that refers to a signet or a stamp of ownership. It is a clear identification of possession.

7. Sealing Transmits Intention (Phi
Sealing Transmits Intention (Phi. 1:6) God began His plan of redemption in the believer's life at conversion. His soul was redeemed from the bondage of sin. Yet, God is not finished with the believer. It is God's intention to also redeem the body. This is precisely what the Word of God is talking about when referring to the Holy Spirit as the "earnest." The presence of the Holy Spirit in the body of the believer is God's guarantee that the process of redemption will indeed be completed. (Eph. 1:14; 4:30)

8. Administration
Every saved person is indwelt by the Holy Spirit; but not every Christian is Spirit filled.
In Ephesians 5:18 Paul draws a very careful analogy between two experiences to define the point. To be drunk with alcohol is to be "under the influence" or under the control of the "spirits" of the bottle. This is strictly prohibited in the life of a believer. Christians are to "be filled with the Spirit," or to be "under the influence" or control of the Holy Spirit who lives within.

9. Whereas being indwelt by the Holy Spirit is a once for all, irrevocable event that transpires at conversion, the filling of the Holy Spirit is to be a continuous, ongoing experience in the life of the believer. First, the verb is in the imperative mood, meaning that the Word of God is issuing an express command. As surely as being drunk with wine is a direct act of disobedience to the Word of God, so is failure to be filled with the Spirit. It is sin not to be Spirit filled. Secondly, the tense of the verb is present denoting continuing action. The believer is to continuously "be being filled" with the Holy Spirit; he is to be constantly under the influence or control of the Holy Spirit of God.

10. Being Spirit filled requires a submissive spirit and willingness to listen to the guidance of the Spirit (Romans 8:14), the teaching of the Spirit (1 John 2:20,27), and to accept the power of the Spirit (Philippians 2:13). Only by the power of the Holy Spirit is it possible for a believer to truly reflect the very essence of the character of Christ. (Gal. 5:16)
Spirit filled believers are characterized by holiness of life or if you please, Christlikeness. Yet, this holiness is not an austere melancholy joyless existence. Quite the contrary! The evidence that the Holy Spirit is in control is found in Ephesians 5:19,20.