[實習] Authority

"Put a coat on and pretend, if you have to; take the role as the authority."
I was told to do something I have never felt comfortable doing for the past 2 years:
to coat myself with authority.
I hate talking over others, don't like to tell others what they should do and particularly, do not feel comfortable taking the leading role when the actual leading person is in the same room with me.
I once requested a supervisor to stay behind the one-way mirror, and do not enter the room unless I did something horrible.
Urghh...I can talk louder, but I'm just not an authority-type of person!
I see some take really good charge in the therapy room, but, honestly, they don't always perform as well as they act.
Nowadays, faked confidence/coated authority is apparently one of the basic skills while entering a profession.