"金が錆びるなら、鉄は何ができるだろうか"

Simplified Meaning:

Think of gold and iron as two types of people. Gold represents a person of great value and high character, like a wise leader or a respected teacher. Iron stands for an average person who looks up to someone like gold for guidance. If even the gold person, who is supposed to be strong and pure, starts to decay or lose their integrity (rusts), then how can the less strong person (iron) be expected to do any better? Imagine a popular teacher in a school. If this teacher starts acting unfairly or dishonestly, students who rely on them might feel confused and lost. They might start behaving badly themselves because their role model is no longer setting a good example. This idea tells us how important it is for those in leadership or important roles to maintain their integrity and honesty. When they do, it helps everyone else stay on the right path too. In your life, think about the people who look up to you, like younger siblings, classmates, or colleagues. By always trying to be a good example, you help those around you to also make good choices. If you slip up, it can have a negative impact on them too. So, strive to stay 'golden' in your character and actions.