What is ‘Lucky Girl Syndrome’ and the logic and science behind this powerful affirmation

The Lucky Girl Syndrome does not make you do any extra efforts, spend any money, or even learn something. It just asks you to say good things about yourself, your life, the opportunities you want, and simply rewire your brain into thinking that everything is going exceptionally well for you. No expensive journals, no gurus, no 10-minute meditation, nothing of the sort. Just a few sentences, spoken in a state of complete happiness, and believing in it.