The source of Reality.
In our solar system, the center of illumination is the sun itself. Through the will of God this central luminary is the one source of the existence and development of all phenomenal things...if we reflect deeply we will perceive that the great bestower and giver of life is God; the sun is the intermediary of His will and plan.
...Likewise in the spiritual realm of intelligence and idealism there must be a center of illumination, and that center is the everlasting ever-shining Sun, the Word of God. Its lights are the lights of reality which have shone upon humanity, illuminating the realm of thought and morals, conferring the bounties of the divine world upon man. These lights are the cause of the education of souls and the source of the enlightenment of hearts, sending forth in effulgent radiance the message of the glad-tidings of the Kingdom of God....
...This Sun of Reality, this center of effulgences is the prophet or Manifestation of God. Just as the phenomenal sun shines upon the material world producing life and growth, likewise the spiritual or prophetic Sun confers illumination upon the human world of thought and intelligence, and unless it rose upon the horizon of human existence the kingdom of man would become dark and extinguished.
The Sun of Reality is one Sun but it has different dawningplaces, just as the phenomenal sun is one although it appears at various points of the horizon....Souls who focus their vision upon the Sun of Reality will be the recipients of light no matter from what point it rises, but those who are fettered by adoration of the dawning-point are deprived when it appears in a different station upon the spiritual horizon.
Furthermore, just as the solar cycle has its four seasons, the cycle of the Sun of Reality has its distinct and successive periods. Each brings its vernal season or springtime. When the Sun of Reality returns to quicken the world of mankind a divine bounty descends from the heaven of generosity. The realm of thoughts and ideals is set in motion and blessed with a new life. Minds are developed, hopes brighten, aspirations become spiritual, the virtues of the human world appear with freshened power of growth and the image and likeness of God become visible in man. It is the springtime of the inner world. After the spring, summer comes with its fullness and fruitage spiritual; autumn follows with its withering winds which chill the soul; the Sun seems to be going away until at last the mantle of winter overspreads and only faint traces of the effulgence of that divine Sun remain. Just as the surface of the material world becomes dark and dreary, the soil dormant, the trees naked and bare and no beauty or freshness remain to cheer the darkness and desolation, so the winter of the spiritual cycle witnesses the death and disappearance of divine growth and extinction of the light and love of God.
But again the cycle begins and a new springtime appears. In it the former springtime has returned, the world is resuscitated, illumined and attains spirituality; religion is renewed and reorganized, hearts are turned to God, the summons of God is heard and life is again bestowed upon man.
For a long time the religious world had been weakened and materialism  had advanced; the spiritual forces of life were waning, moralities were becoming degraded, composure and peace had vanished from souls and satanic qualities were dominating hearts;...God was neglected ...and the season of winter fell upon mankind. But in the generosity of God a new springtime dawned, the lights of God shone forth, the effulgent Sun of Reality returned and became manifest...a new spirit of life breathed into the body of the world and continous advancement became aparent.
...May fanticism and religious bigotry be unknown, all humanity enter the bond of brotherhood, souls consort in perfect agreement, the nations of earth at last hoist the banner of truth and the religions of earth enter the divine temple of oneness, for the foundations of the heavenly religions are one reality
Reality is not divisible; it does not admit multiplicity. All the holy Manifestations of God have proclaimed and promulgated the same reality. They have summoned mankind to reality itself and reality is one.
The clouds and mists of imitations have obscured the Sun of Truth. We must forsake these imitations, dispel these clouds and mists and free the Sun from the darkness of superstition. Then will the Sun of Truth shine most gloriously; then all the inhabitants of the world will be united, the religions will be one, sects and denominations will reconcile, all nationalities will flow together in the recognition of one fatherhood and all degrees of mankind gather in the shelter of the same tabernacle, under the same banner.
Until the heavenly civilization is founded, no result will be forthcoming from material civilization, even as you observe. See what catastrophes overwhelm mankind. Consider the wars which disturb the world. Consider the enmity and hatred. ...
If the civilization of the Kingdom be spread to all the nations, this dust of disagreement will be dispelled, these clouds will pass away and the Sun of Reality in its greatest effulgence and glory will shine upon mankind.

                                             Abdu'l-Bahá, excerpts from "Foundations of World Unity"-selections of public addresses delivered by Abdu'l-Baháduring His journey through Europe and America.

"The Sun of Reality" for this Age of Fulfillment is Bahaullah "The Glory of God".
See www.Bahai.org or www.Bahai.us.
http://www.youtube.com/results?search_query=bahaullah+and+the+bahai+faith&search=Search
Via this link you can view some parts of the history of the Bahai Faith.

Bye for now
Greetings from Laila Falck