The real bite here is that Musashi, a 17th-century swordmaster, isn't merely advocating for broad knowledge—he's describing how *comparison itself* becomes the engine of understanding. You can't know what makes Earth peculiar, or what gravity actually does, until you've seen how things work differently elsewhere. This applies directly to how we judge our own lives: someone who's only known one job, one relationship, one community often mistakes their particular circumstances for universal laws, mistaking habit for truth. It takes the discipline of looking outward—reading widely, seeking unfamiliar perspectives, even just asking older friends about how they did things differently—to recognize which of our struggles are genuinely ours and which are simply what we inherited.