“Jesus replied, Your mistake is that you don’t know the Scriptures, and you don’t know the power of God. For when the dead rise, they will neither marry nor be given in marriage. In this respect they will be like the angels in heaven” (Mark 12:24-25, NLT).
The Sadducees based their views on the Torah, the first five books of the Old Testament, and they were fond of debating about Jewish religious teachings. They didn’t believe in the resurrection from the dead and so they asked Jesus a question about resurrection and framed it as a question about marriage.
Jesus recognized their hypocrisy and addressed their real question directly from the very Scriptures they purported to believe.
But, Jesus prefaced His remarks with this piercing accusation: You don’t know the Scriptures and so you don’t know the power of God!
Steve's Bible Meditations 