Dearly-beloved friends: Though the Revelation of Bahá'u'lláh has been delivered, the World Order which such a Revelation must needs beget is as yet unborn. Though the Heroic Age of His Faith is passed, the creative energies which that Age has released have not as yet crystallized into that world society which, in the fullness of time, is to mirror forth the brightness of His glory. Though the framework of His Administrative Order has been erected, and the Formative Period of the Bahá'í Era has begun, yet the promised Kingdom into which the seed of His institutions must ripen remains as yet uninaugurated....
"The heights," Bahá'u'lláh Himself testifies, "which, through the most gracious favor of God, mortal man can attain in this Day are as yet unrevealed to his sight. The world of being hath never had, nor doth it yet possess, the capacity for such a revelation. The day, however, is approaching when the potentialities of so great a favor will, by virtue of His behest, be manifested unto men."
For the revelation of so great a favor a period of intense turmoil and wide-spread suffering would seem to be indispensable. Resplendent as has been the Age that has witnessed the inception of the Mission with which Bahá'u'lláh has been entrusted, the interval which must elapse ere that Age yields its choicest fruit must, it is becoming increasingly apparent, be overshadowed by such moral and social gloom as can alone prepare an unrepentant humanity for the prize she is destined to inherit....
As we view the world around us, we are compelled to observe the manifold evidences of that universal fermentation which, in every continent of the globe and in every department of human life, be it religious, social, economic or political, is purging and reshaping humanity in anticipation of the Day when the wholeness of the human race will have been recognized and its unity established. A twofold process, however, can be distinguished, each tending, in its own way and with an accelerated momentum, to bring to a climax the forces that are transforming the face of our planet. The first is essentially an integrating process, while the second is fundamentally disruptive. The former, as it steadily evolves, unfolds a System which may well serve as a pattern for that world polity towards which a strangely-disordered world is continually advancing; while the latter, as its disintegrating influence deepens, tends to tear down, with increasing violence, the antiquated barriers that seek to block humanity's progress towards its destined goal. The constructive process stands associated with the nascent Faith of Bahá'u'lláh, and is the harbinger of the New World Order that Faith must erelong establish. The destructive forces that characterize the other should be identified with a civilization that has refused to answer to the expectation of a new age, and is consequently falling into chaos and decline.
A titanic, a spiritual struggle, unparalleled in its magnitude yet unspeakably glorious in its ultimate consequences, is being waged as a result of these opposing tendencies, in this age of transition through which the organized community of the followers of Bahá'u'lláh and mankind as a whole are passing....
It is not my purpose to call to mind, much less to attempt a detailed analysis of, the spiritual struggles that have ensued, or to note the victories that have redounded to the glory of the Faith of Bahá'u'lláh since the day of its foundation. My chief concern is not with the happenings that have distinguished the First, the Apostolic Age of the Bahá'í Dispensation, but rather with the outstanding events that are transpiring in, and the tendencies which characterize, the formative period of its development, this Age of Transition, whose tribulations are the precursors of that Era of blissful felicity which is to incarnate God's ultimate purpose for all mankind. (Shoghi Effendi, ‘The Unfoldment of World Civilization’, 11 March 1936, ‘The World Order of Bahá'u'lláh: Selected Letters’; The Compilation of Compilations, vol. II, The Significance of the Formative Age of Our Faith)