Natural religion insufficient; and reveal'd necessary to man's happiness in his present state [electronic resource] : or, a rational enquiry into the principles of the modern deists: Wherein is largely discovered their utter Insufficiency to answer the great Ends of Religion, and the Weakness of their Pleadings for the Sufficiency of Nature's Light to eternal Happiness; And particularly the Writings of the learn'd Lord Herbert, the great Datron of Deism, to wit, His Books de Veritate, de Religione Gentilium, and his Religio Laici, in so far as they assert Nature's Light able to conduct us to future Blessedness, are consider'd, and fully answer'd: to which treatise are annex'd several essays upon other subjects. By the late Reverend Mr. Thomas Halyburton Professor of Diyinity in the University of St. Andrews.