No Repeat: (Unedited): 24 June 2008:

The mistakes and sins that your family and friends have made in their own lives. Does not give you permission to repeat those very same mistakes and sins.
C.J. MacKechnie

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It is just like when. The parent tells the child to live a life with character, honor and without sin. Then the parent is witnessed by the child getting drunk, smoking, lying, cheating, having many sexual partners and etc. What will the child believe. The truth in words? Or the truth in action?"
By discovering and knowing the mistakes and sins that your family and friends have made. Enables you to logically not make those same mistakes in your own personal life.
Also, By discovering and knowing those things that your family and friends have done right. You have a template to follow.