April 30

The tribulations attending the progressive unfoldment of the Faith of Bahá'u'lláh have indeed been such as to exceed in gravity those from which the religions of the past have suffered. Unlike those religions, however, these tribulations have failed utterly to impair its unity, or to create, even temporarily, a breach in the ranks of its adherents. It has not only survived these ordeals, but has emerged, purified and inviolate, endowed with greater capacity to face and surmount any crisis which its resistless march may engender in the future. 
(Shoghi Effendi, ‘God Passes By’; The Compilation of Compilations, vol. II, Opposition)