People are not persuaded by what you say, but by what they understand.

- Speeches by Management, Advanced Communication Series, Toastmaster International.

理解して、納得してくれたことでしか人は動かない。至極当たり前のことなのについ見過ごしてしまう事実。このフレーズに続いて、"To determine what motivates others, you have to see the world through their eyes and understand their point of view."とあります。人間同士のコミュニケーションの核心ですね。