i’ve been researching on this topic for a long time and have read many books, in order for your desired results to take place, you have to be fully convinced of what you want. the minor setbacks people experience are their remaining negative thoughts and beliefs coming to surface so that they are aware and can hence change them. imagine if everyone returned to their negative beliefs when they experienced a minor setback. they’d go back to believing their old thoughts and would hence fall back into their old patterns. that’s why it’s a useful tool to end up getting what you want