I have beliefs that hold me back as well. The problem I have is that using the "hacks" in this article goes against one of these beliefs. I don't really believe

I have beliefs that hold me back as well. The problem I have is that using the "hacks" in this article goes against one of these beliefs. I don't really believe in changing your beliefs by simply talking into a mirror. I do agree with the people around you affecting you and shaping your judgement. I always thought that these kind of methods were designed for weak people. Because of this I usually don't ever really try any of these methods. Anyone else feel the same?