Ephesians 2:8-9 (ESV)
8  For by  grace you have been saved through faith. And this is not your own doing; it is  the gift of God,
9  not a result of  works, so that no one may boast. 

Acts 1:8 (ESV)
8  But you will receive power when the Holy Spirit has come upon  you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and  to the end of the earth.”