In that case, bubbleghost, I have an interesting book to recommend to you:

Barbara Ehrenreich - Bright-sided: How Positive Thinking is Undermining America

As far as she is concerned, the whole concept of "positive thinking" is little more
than a collective delusion made marketable.

If you live in the United Kingdom (for example), here's a link to the book under
its alternative title. The title suggests the implicit threat associated with "positive
thinking" regarding breast cancer:

Barbara Ehrenreich - Smile or Die: How Positive Thinking Fooled America and the World, available on Amazon UK

I enjoyed reading it hugely, and I recommend it to you without hesitation.