What is the rule of positive self talk? if people are not assertive, aggressive, or arrogant, what kind of approach do they have?

The rule of positive self talk is "Never say anything to yourself that you would not say to someone else. Be gentle and encouraging to yourself." You need to look in a positive way of yourself in order to have a  good outcome and a good day ahead.

Because writing on paper is said to engrave what your writing down into your brain therefore writing your thoughts is better than speaking them.

Where is the sentence?