"Theory of positive affirmations" and related ideas have been floating around for a long time. There is some scientific research around this (https://www.psycho

"Theory of positive affirmations" and related ideas have been floating around for a long time. There is some scientific research around this (https://www.psychologytoday.com/us/blog/the-age-of-overindulgence/202307/the-science-behind-self-affirmations https://www.psychologytoday.com/us/blog/the-age-of-overindul...) but there are also some culty groups that use it for indoctrination or as sales tools.