Jesus marriage and his children are the secret Christianity does not want you to know, because the early Christian church leadership was based on the concept of apostolic descent, which only works if Jesus died without heirs. In the 1200s, the Catholic church, in order to consolidate power, undertook to erase from the world the descendants of the historical Jesus, and all public record that they had ever existed. In the process, 1/2 the population of Southern France was murdered.
In the place of "faith accepted at second hand", the Cathars insisted on direct and personal knowledge, a religious or mystical experience apprehended at the individual in a firsthand fashion. This experience has been called gnosis, from the Greek word for "knowledge", and for the Cathars it took precedence over all creeds and dogma. Given such emphasis on direct personal contact with God -- priests, bishops, and other clerical authorities became superfluous. Also, Popes. Oops."
... the rest of the post by Ming is well worth reading.