A Discourse on the Liberty of Prophesying is an essay on the need for religious freedom. It purports to show “the unreasonableness of prescribing to other men’s [sic] faith; and the eniquity [sic] of persecuting differing opinions.” The essay is unique for a number of reasons, one of which is that it was written nearly 50 years before John Locke’s seminal “A Letter Concerning Toleration.”