The quote about Guts' sword is repeated, likely a reminder before his confrontation with Lord Zondark. Zondark states that the size of a weapon is nothing more than baggage if not handled properly. In other words, the challenges and traumas will only weigh us down if we can't utilize them in some capacity. Unluckily for him, Guts is fueled by his past experiences and easily manages to win.
There is also a brief exploration of fear and paranoia, eerily reminiscent of the culture of mistrust practiced in the Soviet Union. This religious authoritarian figure's paranoia about heretics has resulted in everyone living caged inside their own homes, constantly vigilant and suspicious of one another. This atmosphere underscores an aspect of self-preservation, as people become more concerned with their own safety, isolating even friends and family.