1 Corinthians 6:19
What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own?
As Christians, we believe that God dwells within us. Our bodies become His home, and it makes sense that we should try to make His surroundings as nice as possible. The temple of God in Israel was kept immaculately clean and pure. Only the most clean and holy of men were allowed to enter it. It was revered by all. The temple was the most holy and special place of all. When we are told that our bodies are the temple of God, it is not an option whether or not we will take care of it; it is a duty. When we care for our physical being, we are making God's temple a holy and special place.
Today's thought: We diet not only for ourselves, but for God!