Power with Purpose

Jesus gave the disciples power and authority prior to His death (Luke 9). He gave them authority again just before He returned to heaven (the Great Commission) however they had to get power for themselves at Pentecost. The outpouring of the Holy Spirit at Pentecost was so that they, and therefore we, would be witnesses (of His resurrection) in order for us to be empowered to do the work Jesus commissioned us to do.