In every piece of good-fortune he saw a special answer to his prayers; in every mortification or calamity, the special personal malice of the devil and his agents. Yet both himself and his father were occasionally troubled with "temptations to atheism," doubts which they did not hesitate to ascribe to diabolical influence. The secret consciousness of these doubts of their own was perhaps one source of their great impatience at the doubts of others. Cotton Mather had taken a very active part in the late case of witchcraft; and, that he might study the operations of diabolical agency at his leisure, and thus be furnished with evidence and arguments to establish its reality, he took the eldest of the bewitched children home to his own house. His eagerness to believe invited imposture. His excessive vanity and strong prejudices made him easy game. Adroit and artful beyond her years, the girl fooled him to the top of his bent. His ready pen was soon furnished with materials for "a story all made up of wonders," which, with some other matters of the same sort, and a sermon preached on the occasion, he presently published, under the title of _Memorable Providences relating to Witchcrafts and Possessions_, with a preface in which he warned all "Sadducees" that he should regard their doubts for the future as a personal insult. Cotton Mather was not the only dupe. "The old heresy of the sensual Sadducees, denying the being of angels either good or evil," says the recommendatory preface to this book, signed by the other four ministers of Boston, "died not with them, nor will it, whilst men, abandoning both faith and reason, count it their wisdom to credit nothing but what they see or feel. How much this fond opinion hath gotten ground in this debauched age is awfully observable; and what a dangerous stroke it gives to settle men in atheism is not hard to discern. God is therefore pleased, besides the witness borne to this truth in Sacred Writ, to suffer devils sometimes to do such things in the world as shall stop the mouths of gainsayers, and extort a confession from them." They add their testimony to the truth of Mather's statements, which they commend as furnishing "clear information" that there is "both a God and a devil, and witchcraft." The book was presently republished in London, with a preface by Baxter, who pronounced the girl's case so "convincing" that "he must be a very obdurate Sadducee who would not believe it."