“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." Acts 1:8 (ESV)
The power proclaimed by Jesus here was proscribed for a specific purpose… so His disciples would become His witnesses.
The greek word for “witnesses” here is martyreusu, which is where our English word martyr is derived.
Jesus has given us the blessing of the indwelling Spirit of God, not merely for personal consumption but for function.
As good as it feels to be filled with God’s Spirit, we were filled for function.