Reverend Hale has come to Salem to provide some help or insight into the problem of the perceived possession of the girls. He enters as a learned individual, a man of letters and someone who has the credibility as both a trained professional and outsider into the town's issues. Hale is zealous about his "first call," and Miller describes him as such: "His painfully acquired armory of symptoms, catchwords, and diagnostic procedures is now to be put to use at last." He is excited about the opportunity to provide "goodness and its preservation" to the people of Salem. At the same time, he is almost anticipating a "bloody fight with the Fiend himself."
It is in this light where Hale comes to Salem. It has become clear that there is an issue with the Devil in Salem and Hale wants to be a part of the solution to the problem. This being his first assignment, he approaches it with much in way of anticipation and excitement. For Hale, this is the chance of a lifetime. His entry into Salem is conceived out of goodness and the belief that he is doing "God's work." He enters Salem on the side of the prosecution. As the drama unfolds, it becomes clear that his own certainty and maintaining it is his own crucible.
Reverend Hale is a supposed expert in witchcraft. Reverend Parris requested that Reverend Hale come to Salem to investigate suspected witchcraft that may have affected his daughter Betty Parris.