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" Now think of a professor who faces you from the front of the room; who makes eye contact with the audience; who has invested time and energy thinking about how you think; who pays attention to your attention span; who is aware of what words you know and what words or concepts confuse you; who knows the demographics of the audience—age, gender, nationality, ethnicity, political leanings, cultural leanings, propensity to laugh, to cry; who carries some pop-culture fluency, for easy reference and analogy, but only when teaching the subject can be assisted by such references. That person is not lecturing to you. That person has opened conduits tailored to that audience in that moment, and at that time. That’s communicating. "
― Neil deGrasse Tyson , Letters From An Astrophysicist