No, not, dont, cant, wont, and what ifs these are the usual manifestations of negative thinking. Its as if they have this function to build a wall between you and the place youre going; thus, holding you back from doing something without even trying. Thats how evil negative thoughts can be.
Clash between Positive and Negative Thoughts
A linguistics professor was lecturing to her class one day. "In English," she said, "A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative."
A voice from the back of the room piped up, "Yeah, right."
The concept of positive and negative exists in many fields of study. And in all of these, they seem to oppose each other. They are in constant conflict. Like in the above joke, in grammar and languages, they refer to expressions. Positive expressions state affirmations and agreement to something previously said, while negative expressions declare disagreements and differences of opinion in a discourse.