Into this controversy Pope was led by his deepening intimacy with Bolingbroke, who had returned from France in 1725 and settled at his country place within a few miles of Twickenham. During his long exile Bolingbroke had amused himself with the study of moral philosophy and natural religion, and in his frequent intercourse with Pope he poured out his new-found opinions with all the fluency, vigor, and polish which made him so famous among the orators and talkers of the day. Bolingbroke's views were for that time distinctly heterodox, and, if logically developed, led to complete agnosticism. But he seems to have avoided a complete statement of his ideas to Pope, possibly for fear of shocking or frightening the sensitive little poet who still remained a professed Catholic. Pope, however, was very far from being a strict Catholic, and indeed prided himself on the breadth and liberality of his opinions. He was, therefore, at once fascinated and stimulated by the eloquent conversation of Bolingbroke, and resolved to write a philosophical poem in which to embody the ideas they held in common. Bolingbroke approved of the idea, and went so far as to furnish the poet with seven or eight sheets of notes "to direct the plan in general and to supply matter for particular epistles." Lord Bathurst, who knew both Pope and Bolingbroke, went so far as to say in later years that the 'Essay' was originally composed by Bolingbroke in prose and that Pope only put it into verse. But this is undoubtedly an exaggeration of what Pope himself frankly acknowledged, that the poem was composed under the influence of Bolingbroke, that in the main it reflected his opinions, and that Bolingbroke had assisted him in the general plan and in numerous details. Very properly, therefore, the poem is addressed to Bolingbroke and begins and closes with a direct address to the poet's "guide, philosopher, and friend." In substance the 'Essay on Man' is a discussion of the moral order of the world. Its purpose is "to vindicate the ways of God to man," and it may therefore be regarded as an attempt to confute the skeptics who argued from the existence of evil in the world and the wretchedness of man's existence to the impossibility of belief in an all-good and all-wise God. It attempts to do this, not by an appeal to revelation or the doctrines of Christianity, but simply on the basis of a common-sense interpretation of the facts of existence. A brief outline of the poem will show the general tenor of Pope's argument.