The teaching campaign, inaugurated throughout the states of the North American Republic and the Dominion of Canada, acquires, therefore, an importance, and is invested with an urgency, that cannot be overestimated. Launched on its course through the creative energies released by the Will of ‘Abdu’l-Bahá, and sweeping across the Western Hemisphere through the propelling force which it is generating, it must, I feel, be carried out in conformity with certain principles, designed to insure its efficient conduct, and to hasten the attainment of its objective. Those who participate in such a campaign, whether in an organizing capacity, or as workers to whose care the execution of the task itself has been committed, must, as an essential preliminary to the discharge of their duties, thoroughly familiarize themselves with the various aspects of the history and teachings of their Faith. In their efforts to achieve this purpose they must study for themselves, conscientiously and painstakingly, the literature of their Faith, delve into its teachings, assimilate its laws and principles, ponder its admonitions, tenets and purposes, commit to memory certain of its exhortations and prayers, master the essentials of its administration, and keep abreast of its current affairs and latest developments. They must strive to obtain, from sources that are authoritative and unbiased, a sound knowledge of the history and tenets of Islám—the source and background of their Faith—and approach reverently and with a mind purged from preconceived ideas the study of the Qur’án which, apart from the sacred scriptures of the Bábí and Bahá’í Revelations, constitutes the only Book which can be regarded as an absolutely authenticated Repository of the Word of God. They must devote special attention to the investigation of those institutions and circumstances that are directly connected with the origin and birth of their Faith, with the station claimed by its Forerunner, and with the laws revealed by its Author.