Indoctrination and reinforcement of the changed aspects of self that have been set off balance through cognitive dissonance are often accomplished through social mentoring and this helps solidify the transformation. So if I can get you to feel something, the quicker that I can get you to behave in accordance with your feelings, the more solid the transformation becomes.
"Can you say, Amen?" That's a "three-fer." I've invited you to think in agreement with me, I've asked you to respond with an action of repeating me, and I've likely engaged your emotion. The quicker that I can get you to reinforce the shift or change, the better. This is great to know when buying a car. The salesman wants you to get in the car, drive it, love it and want it. If he can get your name and number (if you weren't absolutely determined to consider buying the car), and you like him, he's much closer to closing the sale. The quicker that he can facilitate this, all the better