According to Osho, when true communion happens you cannot speak; your voice fades because in that silent meeting he becomes your voice. As the 'you' dissolves—mind, borrowed thoughts, and questions drop—there is simply nothing to say. Two zeros merge; nearness to the Master is losing your separate self, relaxing into listening rather than talking.
When you really listen, your sense of “me” and its noisy thoughts quiet down, so words stop and silence speaks.