Our beliefs are determinants of how we live because of them depends on what we can see. As we do not think we are blind.
The popular saying "If you do not see will not believe" works forwards and backwards.
When my sister tells me her daughter grew three inches in just nine days I can not believe it, but when I meet the girl I recognize that the mother was right. However, "if you do not see will not believe" because I knew that someone would grow so fast.
Obesity is often attributed to eating disorders. Popularly a majority believes that obesity occurs because mechanically eat more food than they are spent, so to start buying things at a supermarket to the point where the cart is overflowing and unable to add more.
What are these people is linked with what they believe: if they see an overweight person they imagine sedentary and gluttonous. These beliefs are most evident when playing his dietitians and therapeutic begin consulting on a survey if they exercise regularly, if you eat enough fruits and vegetables, if they eat too much wheat flour, fats, sweets.
In this case the adage works in reverse, ie, "If you do not believe, do not see" if they did not believe in what the causes of overweight would not (would imagine) a sedentary lifestyle and high calorie diet.
With the exception of the blind, the sense of sight is the most important because it took the references that guide us to live. The other four senses are secondary.
For this reason our beliefs as determinants of how we live, it depends on them what we can see. In all that we do not operate as blind.
Note: Original in Spanish (without translation by Google): Las creencias y la ceguera.
(Este es el Artículo Nº 1.906)