Ephesians 5:18 And be not drunk with wine, wherein is excess; but be filled with the Spirit;
Two factors involved in this verse:
First: The immediately preceding context confines the primary application to behavior, just as the following context relates the “filled” believer to the fellowship of believers.
Second: The imagery stresses control of the behavior by the Holy Spirit – contrasted by being filled with intoxicating drink behavior.
Filling and baptism
Filling is not synonymous with baptism of the Spirit (1 Cor 12:12-14; Eph 4:5), since all believers are baptized into the body of Christ but not all are filled with the Spirit. Filling of the Spirit is not equal to or subsequent to speaking in tongues since some were said to be filled with the Spirit yet never spoke in tongues (Lu 1:15, 41; 4:1). Paul, Stephen and Peter were filled on differing occasions (Acts 13:9; 2:4; 4:8, 31; 7:55). The filling with the Spirit appears to give the one filled a special endowment of words, boldness or recall to honor the Lord or speak to those opposing God’s work. It gives a Godly or God-like behavior