Please explain the significance of your undergarments. Do all Mormons wear them?
Mormon Answer:
The undergarments are a sign of the covenants made in the temple. Only those Latter-day Saints who have entered the temple and have made those covenants to serve God wear the garments. The garments serve as a reminder of those covenants, and might be compared to the purpose of circumcision in the Old Testament.
Question:
Is it true that not all Mormons can enter the temple to go through your ceremonies/sacraments? I've heard of family members even a father in one case who was not allowed to attend the temple marriage ceremony. I never quite understood that one.
Mormon Answer:
Mormons believe that there are certain requirements set by the Lord that one must meet in order to enter His temple. These include trying to obey the law of chasity (no sexual activity outside of marriage), obeying the Word of Wisdom (Mormon dietary code), paying a full tithe, and in general living worthily to enter the Lord's House. The ordinance of baptism by one with the proper authority is also required, and one must claim a testimony in God, His Son, and His Church.
As in ancient times, the temple is considered a sacred place. Only those with clean hands and a pure heart can enter the temple. God's temples aren't closed to anyone; he has set forth the Law, and people have the option of doing what it takes to enter. If people are not living the standards requied, then no, they cannot enter the temple.
The temple should not be confused with the regular chapels where Sunday worship services are held, which is open to the public.