There are no clergy in the Bahá’í Faith. Each person is enjoined by Bahá’u’lláh — the Promised One of all Religions, who founded the Bahá’í Faith — to investigate truth for ourselves, to learn and not rely upon “the knowledge of [our] neighbor” and “see with [our] own eyes.”
The 20th century had a focus on bringing the teachings to and establishing Bahá’í communities in every country and region of the world, which Bahá’ís were quite successful at.
Yes, the Bahá’í teaching that “all the religions are one” is a challenging claim. Religions say different things, contradictory things, often in opposition to each other. In fact, in a single religious tradition — such as Christianity — various denominations often say diametrically opposing things on certain issues, such as who was Jesus, how do we attain salvation and should Christians be drinking alcohol.
To invite us to this relationship with Him, God has raised up messengers from among all peoples around the globe throughout history who have called us to worship our one Creator with sincerity and love and cultivate relationships with others characterized by kindness, compassion and honesty.
In the compilation of an individual Bahá’í’s notes on talks ‘Abdu’l-Bahá gave while he was visiting Paris, France in 1911, called Paris Talks,‘ Abdu’l-Bahá seems to discuss rituals in relationship to two primary concerns.
Believed to be the promised stage in God’s progressive spiritual and social education of our planet, the Bahá’í Faith shares many similarities with Judaism, Christianity, and Islam such as monotheism, stories of many of the same prophets, scriptures in common, practices of prayer, centrality of Grace, and an emphasis on being called to an ethical relationship with our one Creator and Lord.