When we only do what we do because of surface level rationale like, “the Bible says so,” we tend to be dis-interested or marginally engaged. Knowing why we do something is necessary for deep faithfulness. This is vitally true for serving others. If we don’t know why we serve, can we really serve well?
The disciples are given a purpose, they are given a mission, but Christ tells them to wait, for they do not yet have the power from on high. Sometimes waiting is a necessary thing.