Communication is what the listener does. The message they hear matters more than the message you speak.
This has to be one of the most profound principles that should govern communication between two people. It is about the ability and capacity of the person listening, not about the verbosity or grandiloquence of the speaker.
Everyone is at a different level of intellect, intelligence and comprehension. Everyone oscillates at their own frequency. You have to fine-tune a radio set to clearly listen to a channel. Similarly you have to know the right details of a receiver to be able to connect and communicate. A channel broadcasted that no one can tune to is a channel that does not exist. To communicate effectively entails transcending to the intellectual level and capacity of the person on the other end and then communicate. That is why teaching to first graders is most difficult – and schools entrust that job to the most trained teachers.