(The following is important to understand, but in order to be sensitive to time on Sunday, this part of the sermon will be "preached" here!)

So... What IS the Difference Between Being BAPTIZED by the Holy Spirit and Being FILLED with the Holy Spirit? Some people use these terms interchangeably, but there is a difference!
Being BAPTIZED by the Holy Spirit is the work of Christ on a new believer. Upon belief in Him, He puts the Holy Spirit in you and puts you in the body of Christ. (See Romans 6:3-6, 1 Corinthians 12:13, Galatians 3:27). This is what Jesus does to you when you get saved, become born again, become an adopted child of God – He baptizes you in the Holy Spirit. This is a one time event, as the Holy Spirit does NOT leave a believer, return, leave, return, etc. No amount or kind of sin makes the Holy Spirit leave a true believer! 
Being FILLED with the Holy Spirit is a continual experience that we are commanded to allow to happen as we participate with His work in us. Ephesians 5:18 says “be filled with the Spirit”. He does the filling, but this is presented in a way that obviously indicates we have a responsibility to cooperate with Him – allow this to happen to you. The literal translation of the verbiage is “be being filled with the Holy Spirit.” This happens as we keep our mind and heart focused on the Word of God and, as one preacher put it, “practice the presence of God”.
Being baptized in the Holy Spirit grants the power that Jesus promised in Acts 1:8, being filled with the Holy Spirit unleashes that power of God through you.
See you Sunday!

p.s. - Witness His power, then let His power make you a witness!