In the book, Colson argues that the secular world has lost touch with the concept of objective truth and instead relies on a subjective, relativistic moral code. He emphasizes that Christians have a responsibility to stand firm in their faith and not compromise on the truth, even when faced with opposition from the world. He also stresses the importance of Christians being involved in the public square, engaging in discussions and debates about ethics and morality, and making their voices heard. The book is a call to action, urging Christians to reclaim their role as the guardians of truth and to boldly proclaim the Gospel in a world that is increasingly hostile to Christianity. The book is a must-read for anyone who is concerned about the state of our society and wants to make a difference.