This is very simple. The premise we start with is the basic rule by which this physical reality abides. The exterior is a reflection of the interior. Meaning that the physical body, as well as what you call "your life", are a reflection of the mind patterns of your soul personality.
When someone gains weight, the mind pattern is a "need to insulate" from the outside world or from circumstances in your life. Also victims of sexual abuse insulate and get fat to make themselves "undesirable" to potential abusers.
When you diet, you force your body to adjust. But we kow you cannot do that forever. Sooner or later, you'll get back to your own self. What you eat is theoretically insignificant as the body can ue what it needs and waste the rest. We have seen a plethora of things to make ourselvs look "better" : steroids, hormones, fatburners, diet, etc.. it's all temporary. Your body will go back to an exact reflection of the inside as soon as you stop.
Eating good organic whole foods, drinking distilled water, and suplementing with healthy supps is a must for a health conscious person. Lifting weights is healthy, and also low impact cardio.
So for those with weight problems : what exactly are you trying to insulate from now or in your past ?