From the Bible teaching of our beloved Pastor Chuck Smith:

“There is a difference between being filled with the Spirit and being baptized with the Spirit.  Being filled with the Spirit is an experience that begins when you accept Jesus Christ as your Savior.  The Holy Spirit comes into your life and you are to be filled with the Spirit.  As the Spirit is in your life, He will help you.  The word comforter is parakletos.  It is one who comes along or who is called alongside to help.  He will help you to live the Christian life.  It is the Holy Spirit working in you that conforms you into the image of Jesus.  He is the one who gives you the power to be like Christ and to do the works of Christ.  That’s the indwelling of the Holy Spirit.  The baptism of the Holy Spirit is the outflowing of the Holy Spirit from your life.  There is a difference between being filled and overflowing.  The overflow is the baptismal of the Holy Spirit.  That is the outflow of the Spirit rather than the infilling of the Spirit that comes and it brings a transformation within.  But then as the Spirit flows forth out of your life, the dunamis, the power, the dynamic that goes forth from you in touching the world around you.  So that is what Jesus is talking about with His disciples.  Wait, it is going to happen in a few day.  God is going to keep His promise.  You are going to be baptized with the Holy Spirit! “

Pastor Chuck Smith teaching through the Book of Acts.