During a lecture on a television show, Jun Miura introduced something called the "Three Principles of Non-Comparison."
The "Three Principles of Non-Comparison" refer to the practice of not comparing your present self with your past self, others, or your parents.
It is recommended to recite these words whenever you find yourself on the verge of making comparisons, and doing it out loud is said to be especially effective.
Even in places like inside a train, Jun Miura murmurs to himself, "Three Principles of Non-Comparison, Three Principles of Non-Comparison, Three Principles of Non-Comparison..." emphasizing the power of vocalizing this mantra to maintain a peaceful mind.