He talks about the pitfalls of pure rationality. There can be competing explanatory frameworks for the same thing, and they often contradict each other. Rational arguments may seem rigorous like math, but are in practice standing on shifting sands.
It ultimately comes down to what you decide to believe in. This is where traditional values and religion come at play.
It ultimately comes down to what you decide to believe in. This is where traditional values and religion come at play.