And   God blessed   them,   and   God said  unto them, Be fruitful and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea and the fowl of the air, and over every living thing that moveth upon the earth .  (Genesis 1:28 ) A few days ago someone asked me did Cain marry his sister? Originally this was a conversation developed out of simple text message, but later I realized much more was needed.  In order to give a clear answer I was forced to send a lengthy letter. From that letter I am publishing this brief excerpt. Discerning What's Really Being Asked First   I  could hear the truth of what was being asked,  I could hear its contempt of the word of God. and therefore  I perceived the question as “ If God is so righteous then why does he condone incest in the bible? ”.   I prepared myself to defend   the Word of God as we should.  Pl...