It seems Jesus had a pretty messed up family. Obviously we know about the "uniqueness" of the whole un-married teen mom thing, but it gets much weirder than that. One of his ancestors was a woman named Tamar (Genesis 38). Tamar was married, but before she could get pregnant, her husband died. So, as her culture suggested, she then married her brother-in-law, who, again, died before she could get pregnant. So her father-in-law told her to wait until his next son was old enough and then she could marry him as well. This didn't jive with Tamar. She wasn't ready to wait another few years before becoming a mother. So she went with the obvious solution to this problem: She disguised her self as a prostitute and became pregnant through her unsuspecting father-in-law. Jerry Springer, call your office.
A few generations later in Jesus' family tree comes a woman named Ruth. She was a very noble woman with a great story to tell. Sounds like the perfect ancestor - except for one little problem: She was a Moabite. This doesn't mean much to us, but to a biblical Jew, this is a pretty big deal. The Moabites are decedents of (surprisingly) Moab. Moab's father was a guy named Lot - who also happened to be his grandfather. You see where this is going. Lot's daughters weren't able to have children, so they come up with a great idea (a chip of the ol' Tamar block) to get their father really drunk and...you can figure out the rest.
Disgusting? Yes. Immoral? Yes. Against the Law of God? Yes. A true part of our Savior's family history? Yes.
Then there is Bathsheba. We can tend to think of her as a victim of an immoral king - and their may be some truth to that. But I suggest that she knew exactly what she was doing. Bathsheba's husband was a nobody named Uriah. When he was called off to war, Bathsheba starts to think about how better her life could be. She lived right next door to the most powerful and famous man in Israel. So she takes a bath in a place where David could easily see hoping he would come calling. Her plan works perfectly and David, in a selfish and sinful act, brings her to his palace. When she is found to be pregnant, they have to find a way to cover it up so eventually David sends her husband to the front line where he is killed. Adultery, lust, manslaughter, lying. All in Jesus' family.
So why does Matthew open his gospel by telling us this? This genealogy of Jesus is impressive and royal. Jesus can trace his lineage through many great men of God - but it also goes through Tamar, Ruth, and Bathsheba? Why is this significant? I think what Matthew, through the inspiration of God, is trying to say is this: God has used incest, adultery, murder, and foreigners to do his work in the world - and just wait until you see what's next. God doesn't need the best and most talented. Some of the greatest moments in the story of salvation come through normal, flawed people. People who are unprepared and unqualified. People like Mary and Joseph. People like you and me.
So, if God can use that, what can he do with you?