> This is not my thought. It comes from a personal development organization (...)

I'm fairly sure that whatever organization you have in mind were NOT the original "inventors" of the idea that reality is what you make it, and that you actively can modify your subjective reality by choosing a narrative, or expectation, or whatever you want to call it.

This is well used in areas like Cognitive-behavioral therapy (CBT) and you could argue that it touches on both buddhism ("wanting is suffering"), stoicism, what have you.

Basically what I'm trying to say is that these organizations never make up new ideas. It's all branches of philosophy but popularized, so you don't have to apologize for the "source" of these ideas. They're very rarely original.