First it is not little known. It was a common belief even among Roman centurions. The concern are the parallels between Mithraism and Christianity. Mithraism has a long history as Mitra in Hindu mythology, and Mithra in Persian mythology.Mithra was described as the Sun God, and the holiday for Mithra was Christmas.
From:
Mithra the Pagan Christ | Mithraism and Christianity | Mithras the Sun God
"Both Mithras and Christ were described variously as 'the Way,' 'the Truth,' 'the Light,' 'the Life,' 'the Word,' 'the Son of God,' 'the Good Shepherd.' The Christian litany to Jesus could easily be an allegorical litany to the sun-god. Mithras is often represented as carrying a lamb on his shoulders, just as Jesus is. Midnight services were found in both religions. The virgin mother...was easily merged with the virgin mother Mary. Petra, the sacred rock of Mithraism, became Peter, the foundation of the Christian Church."
Gerald Berry,
Religions of the World
"Mithra or Mitra is...worshipped as
Itu (
Mitra-Mitu-Itu) in every house of the Hindus in India. Itu (derivative of Mitu or Mitra) is considered as the Vegetation-deity. This Mithra or Mitra (Sun-God) is believed to be a Mediator between God and man, between the Sky and the Earth. It is said that Mithra or [the] Sun took birth in the Cave on December 25th. It is also the belief of the Christian world that Mithra or the Sun-God was born of [a] Virgin. He travelled far and wide. He has twelve satellites, which are taken as the Sun's disciples.... [The Sun's] great festivals are observed in the Winter Solstice and the Vernal Equinox—Christmas and Easter. His symbol is the Lamb...."
Swami Prajnanananda,
Christ the Saviour and Christ Myth
Mithra has the following in common with the Jesus character:
- Mithra was born on December 25th of the virgin Anahita.
- The babe was wrapped in swaddling clothes, placed in a manger and attended by shepherds.
- He was considered a great traveling teacher and master.
- He had 12 companions or "disciples."
- As the "great bull of the Sun," Mithra sacrificed himself for world peace.
- Mithra was viewed as the Good Shepherd, the "Way, the Truth and the Light," the Redeemer, the Savior, the Messiah.
- Mithra is omniscient, as he "hears all, sees all, knows all: none can deceive him."
- He was identified with both the Lion and the Lamb.
- His sacred day was Sunday, "the Lord's Day," hundreds of years before the appearance of Christ.
- His religion had a eucharist or "Lord's Supper."
- Mithra "sets his marks on the foreheads of his soldiers."
- Mithraism emphasized baptism.