www.sciencemag.org/news/2018/12/just-thinking-you-have-poor-endurance-genes-changesIf thinking you don't got what it takes changes your body so that you actually don't got what it takes then what does that say for those self-important pessimists who are always spreading their negativity to others or attacking optimism and hope.
Also, if talking about something makes it happen more then why are Dims always trying to make us talk about disgusting subjects. To make them happen more? This article is just the tip of the iceberg.