Jesus promised his disciples power. Isn't that attractive? Power. This is a concept that many false teachers have jumped on to tell people that faith in God is about being empowered to be a "better you" or to "live your best life now". They make the Gospel into something that is self serving, materialistic, and short sighted, to say the least.
However, lets look a little closer at what Jesus actually said. The "power" they are to receive is to serve a purpose. It is the power to be a witness for Jesus Christ. It is the power to live the Christian life. It is the power to believe what Jesus believed, which, consequently means that as a Christian you believe that anger=murder, lust=adultery, love=love even for enemies, and that God is to be glorified in everything. It is the power to be a part of the Gospel story, not the power to gain a six or seven figure income, drive the nicest car or have the biggest house.
Jesus said specifically that his disciples would receive power to be his witnesses. So I ask you, have you been a witness for Christ? Do you believe what Christ believed? Do you know what Christ believed? The church in America must wake up and realize that this whole Christianity, church thing isn't about getting my needs filled, it is about doing what God "empowered" us to do. Is your spiritual life falling short? Do you feel spiritually disconnected and weak? Maybe it is because you aren't fulfilling your purpose of being a witness for Christ. God is not going to bless a life that is not fulfilling its God given mission. A church will not be blessed if it refuses to reach its neighborhood or moves so it can "follow the money" as a city transitions.
We who are Christians are a part of the continuing story of Acts. The promise of Acts 1:8 applies to us. We have a job to do. We have been given the tools and the mission. Now, it is time that we spread his message "to the ends of the earth." This video pretty much sums the first half of what I am talking about.