If you don't have faith that you can and will lose weight, then you can't and won't lose weight. Faith is a scientific as well as spiritual principle. It's spiritual in the sense that it can't be perceived by the five senses. For example, you can see the effects of wind blowing but you can't see the wind nor what's causing the wind. Faith is scientific in that there's a particular method by which faith causes the effects you want based on how the mind is structured or how it works.
