190. O source of perversion! # 184This is a reference to Mirza Yahya, known as Subh-i-Azal (Morning of Eternity), a younger half-brother of Baha'u'llah, who arose against Him and opposed His Cause. Mirza Yahya was nominated by the Bab to serve as a figure-head for the Babi community pending the imminent manifestation of the Promised One. At the instigation of Siyyid Muhammad-i-Isfahani (see note 192), Mirza Yahya betrayed the trust of the Bab, claimed to be His successor, and intrigued against Baha'u'llah, even attempting to have Him murdered. When Baha'u'llah formally declared His Mission to him in Adrianople, Mirza Yahya responded by going to the length of putting forward his own claim to be the recipient of an independent Revelation. His pretensions were eventually rejected by all but a few, who became known as Azalis (see note 177). He is described by Shoghi Effendi as the "Arch-Breaker of the Covenant of the Bab" (see God Passes By, chapter X).
191. remember how We nurtured thee by day and by night for service to the Cause # 184In God Passes By, Shoghi Effendi refers to the fact that Baha'u'llah, Who was thirteen years older than Mirza Yahya, had counselled him and watched over his early youth and manhood.
2. From the Introduction we learned that Baha'u'llah was older than his brother. He was also his tutor.