“are doomed not to die, but to be reborn… ‘Does not the child succumb in the youth and the youth in the man; yet neither child nor youth perishes?’”

..."Far from aiming at the overthrow of the spiritual foundation of the world’s religious systems, its avowed, its unalterable purpose is to widen their basis, to restate their fundamentals, to reconcile their aims, to reinvigorate their life, to demonstrate their oneness, to restore the pristine purity of their teachings, to coördinate their functions and to assist in the realization of their highest aspirations. These divinely-revealed religions, as a close observer has graphically expressed it, “are doomed not to die, but to be reborn… ‘Does not the child succumb in the youth and the youth in the man; yet neither child nor youth perishes?’” (George Bernard Shaw - The Marriage of Contrairies)

“They Who are the Luminaries of Truth and the Mirrors reflecting the light of Divine Unity,” Bahá’u’lláh explains in the Kitáb-i-Íqán, “in whatever age and cycle they are sent down from their invisible habitations of ancient glory unto this world to educate the souls of men and endue with grace all created things, are invariably endowed with an all-compelling power and invested with invincible sovereignty… These sanctified Mirrors, these Day-Springs of ancient glory are one and all the exponents on earth of Him Who is the central Orb of the universe, its essence and ultimate purpose. From Him proceed their knowledge and power; from Him is derived their sovereignty. The beauty of their countenance is but a reflection of His image, and their revelation a sign of His deathless glory… Through them is transmitted a grace that is infinite, and by them is revealed the light that can never fade… Human tongue can never befittingly sing their praise, and human speech can never unfold their mystery.”  

Bahá’u’lláh and Shoghi Effendi

(The World Order of Bahá’u’lláh)
www.bahai.org/r/139862098