The word “take” often indicates movement away from the 'speaker', while “bring” indicates movement toward the 'speaker'.
She was invited to be a 'guest speaker' [=to give a speech] at the conference.
Senator Williams was the 'keynote speaker' at the convention.
(..) Upstairs, to the attic. And when you come back down, we'll talk some more. Assuming you're still sane, that is. I am the spirit of Delphi... speaker of the prophecies of Phoebus Apollo... slayer of the mighty Python. Approach, seeker, and ask. I heard there was a prophecy about me. Aye. (..)2013 Percy Jackson: Sea of Monsters