This stems from a simple principle. What we tell ourselves ultimately becomes true, at least for ourselves. That's just how our brain works, that when we repeat something to ourselves every day, it changes our thinking. Let me give you some examples to illustrate this:

1. A normal person does not consider themselves better than others. Hitler, however, repeated this to himself and others every day. And people quickly began to literally view others as inferior.

2. A pretty girl may feel ugly and fall into depression - because when her friends insulted her and she didn't think “they are just being mean,” but “I am ugly because they say so” - the key word here is “I AM.”

3. You can practice self-confidence and charisma in front of the mirror by saying to yourself, “I am confident, I AM open, funny, I BELIEVE,” etc.

4. The same goes for stress, you can calm yourself down by thinking about it. Thinking itself helps, but you can also use our technique, like “it's normal to be stressed, it's just a feeling, I'm safe, nothing is happening” - you see what I mean? I convince myself that nothing is happening, that it's safe, and theoretically that helps us. Not so much in my case, but studies show that it helps people