To be filled with the Spirit means to be controlled by the Spirit. The clue to this definition is found in Ephesians 5:18 where there is contrast and comparison between drunkenness and Spirit-filling. It is the comparison which gives the clue, for just as a drunken person is controlled by the liquor which he consumes, so a Spirit-filled Christian is controlled by the Spirit. This will cause him to act in ways which are unnatural to him, not implying that such ways will be erratic or abnormal, but