Jesus' plan called for action, and how He expressed it predicted its success. He didn't say "you 'might' be my witnesses," or "you 'could' be my witnesses," or even "you 'should' be my witnesses. " He said "you 'WILL' be my witnesses.
I didn't cheer in high school. I was the farthest thing from a cheerleader in high school. We made fun of cheerleaders. Everybody did!