God has revealed Himself to us through His written and living Word. Such truth is security for evangelical Christians. Yet, Guinness brings one to the place of understanding that we are totally out of step with our culture. The issue is not that all truth is God's truth. The fundamental issue in society is that there is no truth at all.
Truth is relative.
Being out of step with society is not wrong when you have and live truth. Our problem is that we don't realize how differently the world thinks. We take truth for granted without realizing that there is a world outside our doors that doesn't even think truth exists. Guinness does not keep one in despair but reminds the reader of the glory of truth. He declares that believers can impact a relativistic world.