Reincarnation & Old Testaments

I was reading "Many Lives, Many Masters" by Brian L. Weiss one day and came upon the linkage of reincarnation with old testaments. I've known so before but Dr. Weiss put them so clearly and in a way that's really easy to comprehend:

"There were indeed references to reincarnation in the Old and New Testaments. In AD 325 the Roman emperor Constantine the Great, along with his mother, Helena, had deleted references to reincarnation contained in the NT. The 2nd Council of Constantinople, meeting in AD 553, confirmed this action and declared the concept of reincarnation a heresy. Apparently, they thought the concept would weaken the growing power of the Church by giving humans too much time to seek their salvation. Yet the original references had been there; the early Church fathers had accepted the concept of reincarnation. The early Gnostics - Clement of Alexandria, Origen, Saint Jerome, and many others - believed that they had lived before and would again." - Many Lives, Many Masters.

In life there are things regardless we believe or not - they exist. Believing in them in a right manner, we'll benefit from the belief. Believing in them in a wrong manner, we'll not enjoy the fruit. Not believing in them in a right manner, still there are plenty of benefits. Not believing in them in a wrong manner, the worst suffering.

So, what I'm saying is "Is your manner right?" "Are we getting the fundamentals right?"