See, but Christianity has always had one unwavering truth, from conception to the present day!

Unless of course it absolutely hasn't.

Ever.

Children's Past Lives DOGMA BITES MAN:

"Throughout the first three centuries of the Christian era, there was no single Christian doctrine. Christian theology and doctrine—interpretations of Christ's teachings blended with ideas from other philosophies and religions—were hotly debated for at least three hundred years. Many of the tenets of the faith that Christians take for granted today were, during this long period of flux, simply one point of view among many.

It is a fact that some Christian sects and writers accepted reincarnation as an enhancement to the teachings of Christ. Origen, one of the heralded Fathers of the Church and described by Saint Gregory as 'the Prince of Christian learning in the third century,' wrote: 'Every soul comes into this world strengthened by the victories and weakened by the defeats of its previous life.'

So if reincarnation was an idea in currency with early Christians, why have all traces of it disappeared from the Christian religion we know today?

By the early fourth century, strong Christian factions were vying with each other for influence and power, while at the same time the Roman Empire was beginning to fall apart. In A.D. 325, in a move to renew the unity of the empire, the absolute dictator Emperor Constantine convened the leaders of the feuding Christian factions at the Council of Nicaea. He offered to throw his imperial power behind the Christians if they would settle their differences and agree on a single creed. Decisions made at this first council set the foundation for the Roman Catholic Church. (Soon after, the books of the Bible were fixed too.) For the sake of unity, all beliefs that conflicted with the new creed were banished; in the process the factions and writings that supported reincarnation were thrown out.

Then, with the applause and support of the Christian leaders, Constantine moved to eliminate competing religions, and to make his personal grip on the Empire even more absolute. The result of the marriage between church and imperial state was a new Church made in the image of the autocratic Roman Empire. This is why, according to some historians, the Church exalts unquestioned central authority, imposes a singular dogmatic creed on its followers, and works so hard to stamp out divergent ideas. This is important, because reincarnation fell outside the official creed."