Ancestors

For most of us, we had very little to do with selecting our ancestors.  You know, the ones that came before us.  The ones from who we are descended.  They have provided that chromosomal material called DNA which make us unique among the worlds population.

Webster defines "ancestor" as "one from whom a person is descended and who is usually more remote in the line of descent than a grandparent."  A great-grandparent and beyond it would be.  Not many of us ever met our great-grandparents in person.  Perhaps there are family items that have been past down through time to us that were part of their lives, but we still carry a portion of their genes as we walk around this earth.  A family we are from the beginning of time...a common thread indeed.

Personality

Human existence provides each of us certain things that are uniquely our own.  That genetic code which directed the formation of this existence is the only one walking around, that is unless your a twin, etc.  Fingerprints are another item that belongs to this set of things that are one of a kind.  Psychology would teach us that personality is "...the unique organization of enduring attributes of the individual."

Now Webster defines this as the organization of the individual's distinguishing character traits, attitudes, or habits.    As early as 400 B.C., Hippocrates thought that certain "humors" [blood, black bile, yellow bile, and phlegm] produced a certain temperament within the individual.  Now a days, we have certainly expanded our concept of this thing called personality, but each of us has one...another common thread.