The quote from Philip Pullman's "The Subtle Knife" reflects the idea that progress and the development of knowledge are often achieved through struggle and conflict. It suggests that the advances in human civilization, whether in wisdom, morality, or understanding, have frequently come at a cost, often extracted from those who resist or oppose change. This indicates a fundamental truth about human history: that growth often arises from adversity and challenge.

This perspective can prompt us to reflect on how societal developments hinge on the interplay of opposing forces. It emphasizes that every gain in enlightenment or advancement often requires confronting and overcoming opposing ideologies or conditions. In this way, the pursuit of knowledge and decency is inextricably linked to struggle, underscoring the complex nature of human progress.