Kristen Bell: 'Veronica Mars' could be my whole life
Bell: I did not feel comfortable taking a right that was denied to some of my best friends. I would want someone to stand up for me if I was denied a right in this country that prides itself on having equal rights for everyone. I believe that gay citizens of this country deserve to share not only the label of marriage but also the rights behind it. There are over 1,100 rights denied to a couple when you can't legally get married. I find that to be mind-boggling. Dax and I both very much wanted to wait because if we did do something for our wedding half the people we would be inviting couldn't celebrate the same right. But when we had a baby it became clear as to why we're fighting for this right, because we don't have some rights in regard to the baby that married couples do. I choose to be on the right side of history and I know in my heart that (equality) is what's right.
mind-bogglingは「あぜんとさせる、度肝を抜かれる、びっくり仰天の、気が遠くなるような」「〔出来事などが〕信じられないような」「〔クイズ・パズル・メカニズムなどが〕非常に複雑［難解］な」（英辞郎 on the WEB)という意味になります。
Merriam-Webster Dictionaryにも"mentally or emotionally exciting or overwhelming "と載っています。