Just how full is “full”? How many people does “all” include? We have to believe that full means complete, and all includes each one of us. “Of His fullness we have all received.” No one, no matter how “anointed” they may appear, has more fullness than anyone else. And if we have received it already then there is nothing for us to do to get it.
If I have already entered into a room and sat down in a chair then there is no need for me to try to get into the room anymore. I am there already. We entered into Christ when He entered into us: we do not have to enter into Him over and over again, we are merely abiding in Him.