They have impact. They have to be chosen very carefully to leave their mark. So before you speak, you want to make sure that every word you intend to say is aimed at the right target and is part of a total structure of meaning. This total structure approach affects basic questions you have to ask when you are writing your scripts for your lectures, presentations or speeches. It is as important to distill your remarks equally for two people as for 200.
Information takes a long time to absorb.
The sound waves are very slow, and our internal processing mechanisms are complex. The information you are giving to your audience needs to be filtered - slowly. And, critically, it needs to be clear and as simple as the subject allows. We haven t finished with the Gettysburg Address and Abraham Lincoln, but let's assume that you have chosen your remarks with care. You have worked out what you will say and you're ready to speak.