The things related by the Evangelists are certainly of the most momentous character, affecting the principles of our conduct here, and our happiness for ever. The religion of Jesus Christ aims at nothing less than the utter overthrow of all other systems of religion in the world; denouncing them as inadequate to the wants of man, false in their foundations, and dangerous in their tendency. It not only solicits the grave attention of all, to whom its doctrines are presented, but it demands their cordial belief, as a matter of vital concernment. These are no ordinary claims; and it seems hardly possible for a rational being to regard them with even a subdued interest; much less to treat them with mere indifference and contempt. If not true, they are little else than the pretensions of a bold imposture, which, not satisfied with having already enslaved millions of the human race, seeks to continue its encroachments upon human liberty, until all nations shall be subjugated under its iron rule. But if they are well founded and just, they can be no less than the high requirements of Heaven, addressed by the voice of God to the reason and understanding of man, concerning things deeply affecting his relations to his sovereign, and essential to the formation of his character and of course to his destiny, both for this life and for the life to come. Such was the estimate taken of religion, even the religion of pagan Rome, by one of the greatest lawyers of antiquity, when he argued that it was either nothing at all, or was everything. _Aut undique religionem tolle, aut usquequaque conserva._(1) With this view of the importance of the subject, and in the hope that the present work may in some degree aid or at least incite others to a more successful pursuit of this interesting study, it is submitted to your kind regard, by Your obedient servant, SIMON GREENLEAF. HARVARD UNIVERSITY, DANE HALL, _May 1, 1846_. CONTENTS AND SYNOPSIS OF THE HARMONY. _The figures in the first column refer to the corresponding Sections in_ NEWCOME’S HARMONY. _Those in the second column to the Sections in this Work._