Religious initiation rites
Many cultures practice or have practiced initiation rites, including the ancient Egyptian, the Hebraic/Jewish, the Babylonian, the Mayan, and the Norse cultures. The modern Japanese practice of Miyamairi is such as ceremony. In some, such evidence may be archaeological and descriptive in nature, rather than a modern practice.
Gnostic Catholicism and Thelema
The Ecclesia Gnostica Catholica, or Gnostic Catholic Church (the ecclesiastical arm of Ordo Templi Orientis), offers its Rite of Baptism to any person at least 11 years old. The ceremony is performed before a Gnostic Mass and represents a symbolic birth into the Thelemic community.
Islam practises a number of ablution ceremonies, but none of them has the character of a religious initiation rite. Christian baptism is challenged in the Quran in the verse: "Our religion is the Baptism of Allah; And who can baptize better than Allah? And it is He Whom we worship". Belief in the monotheism of God in Islam is sufficient for entering in the fold of faith and does not require a ritual form of baptism.
In the Greco-Roman world, the mystery religions were those that required initiation, as distinguished from public rites that were open to all; the Greek word for "mystery", mysterion, comes from mystēs, "initiate." (The contemporary English meaning of "something unknown or hard to know" developed from the secrecy surrounding the arcane knowledge promised by these religions.) The most famous of the ancient mysteries, and the most important in Classical Greece, were the Eleusinian Mysteries. The mysteries known as Orphic, Dionysian or Bacchic pertained to the god Dionysus and his "prophet" Orpheus. In the Hellenistic period under Roman rule, the mysteries of Isis, Mithras, and Cybele were disseminated around the Mediterranean and as far north as Roman Britain.
Apuleius, a 2nd-century Roman writer, described an initiation into the mysteries of Isis. The initiation was preceded by a normal bathing in the public baths and a ceremonial sprinkling by the priest, after which the candidate was given secret instructions in the temple of Isis. The candidate then fasted for ten days from meat and wine, after which he was dressed in linen and led at night into the innermost part of the sanctuary, where the actual initiation, the details of which were secret, took place. On the next two days, dressed in the robes of his consecration, he participated in feasting. Apuleius describes also an initiation into the cult of Osiris and yet a third initiation, all of the same pattern.
The water-less initiations of Lucius, the character in Apuleius's story who had been turned into an ass and changed back by Isis into human form, into the successive degrees of the rites of the goddess was accomplished only after a significant period of study to demonstrate his loyalty and trustworthiness, akin to catechumenal practices preceding baptism in Christianity.
The Sikh initiation ceremony dates from 1699, when the religion's tenth leader (Guru Gobind Singh) initiated five followers and then was himself initiated by his followers. The Sikh baptism ceremony is called Amrit Sanchar or Khande di Pahul. The initiated Sikh is also called an Amritdhari, literally meaning "Amrit Taker" or one who has "Taken on Amrit".
Khande Di Pahul was initiated in the times of Guru Gobind Singh when Khalsa was inaugurated at Sri Anandpur Sahibon the day of Baisakhi in 1699. Guru Gobind Singh asked a gathering of Sikhs who was prepared to die for God. At first, the people hesitated, and then one man stepped forward, and he was taken to a tent. After some time, Guru Gobind Singh came out of the tent, with blood dripping from his sword. He asked the same question again. After the next four volunteers were in the tent, he reappeared with the four, who were now all dressed like him. These five men came to be known as Panj Pyares or the "Beloved Five". These five were initiated into the Khalsa by receiving Amrit. These five were Bhai Daya Singh, Bhai Mukham Singh, Bhai Sahib Singh, Bhai Dharam Singh and Bhai Himmat Singh. Sikh men were then given the name "Singh", meaning "lion", and the women received the last name "Kaur", meaning "princess".
Filling an iron bowl with clean water, he kept stirring it with a two-edged sword (called a Khanda) while reciting over it five of the sacred texts or banis—Japji, Jaap Sahib, Savaiyye, Chaupai and Anand Sahib. The Guru’s wife, Mata Jito (also known as Mata Sahib Kaur), poured sugar crystals into the vessel, mingling sweetness with the alchemy of iron. The five Sikhs sat on the ground around the bowl reverently as the holy water was being churned to the recitation of the sacred verses.
With the recitation of the five banis completed, khande di pahul or amrit, the Nectar of Immortality, was ready for administration. Guru Gobind Singh gave the five Sikhs five palmsful each to drink.
In Brahma Kumarism, after a probationary period of 6 months to 3 years, hundreds of young girls and virgin women are married to the religion's god in mass weddings. Their dowries are taken by the organisation after which they belong to it and are often posted at great distance from their families, unlikely to see them again. Return to the world after doing so is very difficult for them. The practice was defended by the religion as the only way to stop the poor from dumping unwanted daughters on them. 
- "US Grand Lodge, OTO: Ecclesia Gnostica Catholica". Oto-usa.org. March 19, 1933. Retrieved February 25, 2009.
- "Ecclesia Gnostica Catholica: Baptism: Adult". Hermetic.com. Retrieved February 25, 2009.
- Sura 2:138
- Apuleius (1998). "11.23". The golden ass, or, Metamorphoses. trans. E. J. Kenney. New York City: Penguin Books. pp. 208–210. ISBN 0-14-043590-5. OCLC 41174027.
- Apuleius, The Golden Ass (Penguin Books), pp. 211-214
- Hartman, Lars (1997). Into the Name of the Lord Jesus: Baptism in the Early Church. Edinburgh: T&T Clark. p. 4. ISBN 0-567-08589-9. OCLC 38189287.
- Didi Nirmala's visit to Sri Lanka6th August 2013
- Flows of Faith: Religious Reach and Community in Asia and the Pacific. Lenore Manderson, Wendy Smith, Matt Tomlinson. Springer, 16 Feb 2012
- Howell, Julia Day (Sept 1998). "Gender Role Experimentation in New Religious Movements: clarification of the Brahma Kumari case". Journal for the Scientific Study of Religion 37 (3): 453–461. doi:10.2307/1388052. JSTOR 1388052. "The likelihood that surrendered sisters in India will remain Brahmins throughout their lives is increased by the practise of parent giving dowries to the Brahma Kumaris for daughters they concede will not marry. This practise goes back to the early days of the organization but it is not clear how common it was. Whaling and Babb report it as an occasional practise. Recently the pattern has been formalized, with retreats at Mount Abu being offered for girls in their mid-teens who may wish to undertake a fuller commitment to the organization. The girls are offered a short period of taking classes and living near Senior Sisters, at the end of which they may nominate to undertake a year trial as surrendered sisters. A payment equivalent to a dowry is required from the girls' natural families to cover their living expenses over the trial period. This payment is also meant to prevent parent "dumping" daughters on the Brahma Kumaris to avoid the dowries and other costs of ordinary marriages. Return to the world for women who have had such a dowry paid for them is difficult."