Aristotle split persuasion into three appeals: ethos (the speaker's credibility), pathos (the listener's feeling), and logos (the argument itself). Textbooks draw them as a tidy Venn diagram. This is the honest version — a crowd.
Every listener has a prior and a different make-up: some are moved by credibility, some by feeling, some by argument. You compose one appeal in the triangle and deliver it. Conviction ripples outward, and neighbours sway neighbours — but only those close enough to be reachable.
Pathos moves the room fast, yet it doesn't sink in: when you stop, that conviction evaporates. Logos moves few, but what it moves stays. The dashed line on the gauge is that durable share — what will still be there thirty seconds after you fall silent.
And push feeling past what your credibility can carry and it backfires: a pure-pathos harangue reads as manipulation and turns the crowd against you. No single-channel appeal ever carries a mixed audience.
The amphitheater fell silent mid-speech. The lesson continues without it — everything you have already done is safe.