Not only did Christ preach the doctrine of reincarnation, but like the Buddhists, he also preached that it takes three days for the spirit to disengage itself completely from the physical body. As we are taught, Christ rose "on the third day."
Christ gives us numerous references to reincarnation in The Gospel of Thomas:
"where the beginning it, there the end will be...."
..."What you look forward to has already come, but you do not recognize it..."
"...the kingdom is spread out upon the earth, but men do not see it."
My favorite is, "The man old in days will not hesitate to ask a small child seven days old about the place of life, and he will live. For many of us who are first will become last, and they will become one and the same."
The above saying explains why all of us are born with an Ego. It seems that for the first few days of its life, a newly born baby identifies with its prior reincarnation until it can identify with its new family and environment. In short, what we call "instinct" is not so much "instinct" but prior memory.
The Buddhists say that it is extremely difficult for a being to be reborn as a human. If people could come to realize this, perhaps they'd think before they act.