Positive Affirmations for Weight Loss . Permanent weight loss or weight control requires a change in lifestyle. The food we eat, the frequency of eating , the physical exertions that we undergo, the rest we take, the mental attitude that we maintain all over a long period of time, determines our weight and our weight problems. Positive affirmations for weight loss will help you change your lifestyle. It is found that our body maintains the weight that our mind is comfortable with so positive mind and positive affirmations are necessary to be followed.