Philosphical treatments have got a bad rap because it is so easy for conmen to convert them into fake hope, but when properly applied they are still amazingly effective. It's just that "properly applied" is very often not profitable because all the applicable texts and practices have been quite literally known for thousands of years and are available through well known texts in the public domain.
And Sytse if you read this: beterschap en als dat niet helpt: sterkte. Cancer sucks.
Dank je!