Disciples had come complaining that the crowds were drifting to another teacher, and the man they complained to was glad about it. One who does not need to be the center can be delighted by another's flowering, and that delight is larger than anything possession offers.
Ego measures everything by what it holds, so it fights for the bride, the crowd, the credit. Standing outside, hearing a voice, and being full because of it is the state where the false center has already gone. Fullness of that kind cannot be added to, because nothing was being accumulated.