Briefly describe the effects of Dimmesdale's sermon The Scarlet Letter

The Reverend's listeners were shocked into silence, as if they were under a spell.

"There was a momentary silence, profound as what should follow the utterance of oracles. Then ensued a murmur and half-hushed tumult; as if the auditors, released from the high spell that had transported them into the region of another’s mind, were returning into themselves, with all their awe and wonder still heavy on them."