In the book "Engleby" by Sebastian Faulks, the quote highlights the human tendency to cling to beliefs more firmly when faced with challenges. The assertion suggests that these beliefs form a core part of a person's identity, making them resistant to change or doubt. When confronted with opposing ideas or situations, individuals may feel an urgent need to defend their convictions, often becoming more rigid in their stance.

The idea of having "nothing to lose" implies that for some, their beliefs are not just ideas but essential components of who they are. This notion raises the stakes in philosophical or ideological debates, suggesting that losing one's beliefs equates to losing one's sense of self. Hence, people may choose to fight passionately for their beliefs rather than contemplate the possibility of their own fallibility.