Elder Boyd K. Packer answered that question:
The ordinances and ceremonies of the temple are simple. They are beautiful. They are sacred. They are kept confidential lest they be given to those who are unprepared. Curiosity is not a preparation. Deep interest itself is not a preparation. Preparation for the ordinances includes preliminary steps: faith, repentance, baptism, confirmation, worthiness, a maturity and dignity worthy of one who comes invited as a guest into the house of the Lord. All who are worthy and qualify in every way may enter the temple, there to be introduced to the sacred rites and ordinances.
LDS.org points out that many people believe the temple is like a large, grand cathedral. In fact it is made up of many different rooms, all of which serve a specific purpose. As members we enter to make sacred covenants with the Lord, and we return often to both perform the same work for others, as well as to remind ourselves of the covenants we have made. One of my favorite things about the temple is that after the first time through, each trip is an act of service for another person. It’s a wonderful sacrifice of my time.
You can barely see it, but each sealing room includes the “forever mirrors”. It is two mirrors set across from each other, which cause the reflection to go on forever. We believe that our marriage lasts beyond death, extending forever, and the symbolism is very beautiful.
She could barely see over it when she had to kneel down and had to stretch way high to put her arm up on ours.
The girls are so sweet and were so excited. All the way down to the Temple Hope kept saying I just can't wait to see how beautiful the Temple is then she would start singing "I am a Child of God".
(Thanks Rhonda for letting me post this cute story about our dear little Hope.)