Acharya Prashant explains how to test if wisdom is growing by using an analogy of weight loss. If a person who weighed 80 kilograms three years ago now weighs 50 kilograms, they would not want to go back to their old state upon seeing old photographs of their 'big, ungainly, fat' self. This illustrates what a saint means when they say that wisdom, once it grows, keeps growing. The very fact that you have known what it means to be foolish will not allow you to be foolish again. Foolishness is not merely a concept but a lived experience; having 'been there, done that,' you know idiocy and do not want to be there again. The growth of wisdom is described as a parallel aversion towards stupidity, not only personal stupidity but also the stupidity of the world. When you see others caught in the same tangles you once were, you quickly identify the situation. This recognition brings about two parallel things: disdain towards what is happening to the other person and a sense of gratitude that you could be rescued. The speaker compares this to a person who has experienced drowning and been saved; they would never want to go through that experience again and understand what it means to be rescued. As a result, no relation, compassion, or identification with the old self remains possible. The change that has happened keeps you vigilant and open to receiving more change. You realize that if you were blind once, it is possible your eyes are still not fully open. Even when you were blind, you had a lot of belief in your vision, which shows that belief is a danger. Therefore, you cannot allow yourself to believe too strongly, which in turn keeps you open and prepared to change. This is how wisdom keeps growing: you remain open to change, you keep growing, and stupidity keeps reducing. These two are the same thing.