The document discusses the problem with having a mind shaped by culture rather than by God. It says the human mind is naturally depraved and hostile to God, and culture actively tries to conform minds to its worldview. It emphasizes that training young people to develop a Christian worldview is necessary for their survival, as they will encounter competing worldviews. The document also provides strategies for renovating one's mindset, including recognizing cultural influences, rethinking unbiblical ideas, and replacing falsehoods with truth.