The title of this study might well be called, ‘‘Every Christian’’s Greatest Need’’, for there is no greater need today than that every real Christian should be obedient to the command found in Ephesians 5:18, which indicates the necessity of a Spirit-filled life; it is not optional, for it is God’’s command. Notice that:-

To be filled with the Holy Spirit is the CHRISTIAN’’s greatest need. The subject has no reference to the person who is not a Christian.
To be filled with the Holy Spirit is EVERY Christian’’s need. It is the privilege and responsibility of every believer to be filled with the Holy Spirit.
To be filled with the Holy Spirit is every Christian’’s NEED. It is not a luxury but a necessity for all.
To be filled with the Holy Spirit is every Christian’’s GREATEST need. Just as the greatest need of the lost is to be saved, so the greatest need of the saved person is to be filled with the Holy Spirit.
It will save us from very much confusion in connection with this subject if we lay hold of the simple but fundamental fact that: WHILE EVERY CHRISTIAN POSSESSES THE HOLY SPIRIT, THE HOLY SPIRIT DOES NOT POSSESS EVERY CHRISTIAN.

It is one thing to have the Holy Spirit indwelling the life; it is quite another thing to have Him filling and controlling the life. Every believer is indwelt by the Holy Spirit –- look up Romans 8:9; 1 Corinthians 3:16; 6:19; 1 Corinthians 12:13; every Christian is sealed with the Holy Spirit –- look up Ephesians 1:13; 4:30. But every Christian should be filled with the Holy Spirit (Ephesians 5:18).