Our job is to build vast reserves of musical expression in the imagination flowing through the instrument and reaching the audience unimpeded. That's the goal. So the trumpet becomes not the obstacle, but the receptacle and the conduit for your great musical message.
As Mr. Jacobs stressed, think music not muscle, message not mechanics. Your secret weapon and power source is the trumpet in your brain. Nurture it, depend on it, and let it teach the trumpet in your hand. It will discipline your work to be drama-efficient. Always sing before your play. Without that strong first trumpet, the second one doesn't have a chance!