The Excellency Abdul Baha says in his the will tablets on page 13 about the guardian’s succession:
The first teaching out of the twelve ones of Baha’ism is the investigation of truth which is considered as their innovations by Baha’is. As the Excellency Abbas Effendi writes in the book “Makatib”: “These teaching hadn’t been heard by anybody in Iran before the emergence of Bahaullah. Search it in order for you to be clarified.”
Baha’is are a group who believe Islam has abolished for 170 years and after it a new faith called Baha’ism has emerged by a new prophet called Mirza Hussein Ali Nouri Mazandarani known as Bahaullah.