Letters to Serena [electronic resource] : containing, I. The origin and force of prejudices. II. The History of the Soul's Immortality among the Heathens. III. The Origin of Idolatry, and Reasons of Heathenism. As also, IV. A letter to a gentleman in Holland, showing Spinosa's System of Philosophy to be without any Principle or Foundation. V. Motion essential to Matter; in Answer to some Remarks by a Noble Friend on the Confutation of Spinosa. To all which is prefix'd, VI. A preface; being a Letter to a Gentleman in London, sent together with the foregoing Dissertations, and declaring the several Occasions of writing them. By Mr. Toland.