The Christian's companion: or, Sermons on several subjects : Containing, I. Directions how to hear sermons. II. Worldly business no plea for the neglect of religion. III. The marks of the new birth. IV. The power of Christ's resurrection. V. The duty of searching the scriptures. VI. Santa's devices. VII. The knowledge of Jesus Christ the best knowledge. VIII. The heinous sin of drunkenness. IX. The eternity of hell torments. X. The necessary duty of thankfulness for mercies received. To which are added, several prayers. By George Whitefield., A.M. of Pembroke College, Oxford.