It has long been my observation that there are two kinds of books being marketed to Christians. There are some whose foundational message is what you need to do and others whose foundational message is what Christ has already done. The first make a model out of the author, the second make a model out of Jesus. The first place the burden for change on personal power while the second place the burden for change on Christ’s power. It is clear that Girl, Wash Your Face falls squarely in the first category.
Of course, the books that sell the most are the ones that tell us what to do. This is Humanism 101, which is also described as picking yourself up by your bootstraps, believe in yourself, and you are told the world is your oyster. Humanism is a works-based religion in which the adherents are given instructions and told to follow those instructions in order to achieve happiness. It comes in many forms with multiple requirements and the message of society is humanism.