The quote "A hero is a man who does what he can" suggests that a hero is someone who takes action and does their best to make a positive difference, even if their abilities or resources are limited. It emphasizes the idea that heroism is not necessarily about performing grand or extraordinary feats but rather about making an effort and using one's abilities to help others or make the world a better place to the best of their capacity. It celebrates the idea that small acts of kindness, courage, and determination can also define someone as a hero.