For some time I have wanted to understand more about Abrahamic lineage, the twelve tribes of Israel, etc. I am currently studying Genesis, and trying to look up more of the things that I have been satisfied to skim over in the past, and came across this quote regarding traits of blood descendants of Israel. I don't know that it is particularly vital knowledge, but it is certainly interesting.
This first Comforter or Holy Ghost has no other effect than pure intelligence. It is more powerful in expanding the mind, enlightening the understanding, and storing the intellect with present knowledge, of a man who is of the literal seed of Abraham, than one that is a Gentile, though it may not have half as much visible effect upon the body; for as the Holy Ghost falls upon one of the literal seed of Abraham, it is calm and serene; and his whole soul and body are only exercised by the pure spirit of intelligence; while the effect of the Holy Ghost upon a Gentile, is to purge out the old blood, and make him actually of the seed of Abraham. That man that has none of the blood of Abraham (naturally) must have a new creation by the Holy Ghost. In such a case, there may be more of a powerful effect upon the body, and visible to the eye, than upon an Israelite, while the Israelite at first might be far before the Gentile in pure intelligence. (Smith, Teachings, 149–50).
More explanations here.