The quote addresses the dangers of a well-intentioned authority that imposes its will on others under the guise of benefiting them. C. S. Lewis argues that a tyranny exercised for the supposed good of its victims can be more oppressive than that of a selfish ruler, as it operates with a moral justification. While a robber baron may show moments of restraint, those who act out of a misguided sense of moral duty will persistently impose their views and control. The torment from such individuals can be endless because they believe they are acting in the best interest of others, making their oppression harder to challenge. This dynamic highlights the importance of discerning true benevolence from harmful interference. Ultimately, freedom requires questioning the motivations behind authority, even when it claims to act for our benefit.