Don’t be a Christian enthusiast (like a bull-horn corner preacher), or a rational reductionist (like an enlightenment scholar), but allow the Spirit of God and your own Spirit testify that you are a child of God.
Pentecost is Christ’s way of calling us out. It’s Christ’s way of putting us on notice. Leave your shut and locked doors, in which you hide in times of fear and uncertainty, and let the power of the Spirit lead you.
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.