The ten commandments are definitely out dated.  Not that we shouldn't use these laws as a basic guidline to how we should, as christians, live our lives.  You see, in the old testament, the wages of sin was death.  And the only way to come before our Father was thru a priest.  That is where animal sacrifices come into play.  But those laws are known as the "old law", old testament.  Since then, God realized that His children needed another way into salvation, so he sent his only begotten Son to take our place in death.  John 3:16  "For God so loveth man that He gave his only begotten Son".

Now we live in the new testament, under a new law.  Now the wages of sin are paid! thank you Jesus.   And we now can come before our Father, through Christ, just as Christ himself does.  In the old testament there were prophesise being told, and in the new testament, there are prophesies being fufilled.  One of which is the prophesy of the coming King.  We now have a new reason to be excited.  JESUS CHRIST!   halleluhia!