"Of all the work that is done or that can be done for our country, the greatest is that of educating the BODY, the MIND, and above all the CHARACTER, giving spiritual and moral training to those who in a few years are themselves to decide the destinies of the nation."- Theodore Roosevelt

What this quote is saying is that the most important thing you can do for this country is educate someone's body, mind, and his character. The reason to this is because in the future there is a chance those people will make the important decision that will effect everyone. For example you don't know who or what kind of person might become the president of USA. So that is why people should educate their body mind and character. Another example is you don't know who might become a cop. A person that is suppose to protect the innocent and he might be corrupt. So this is why Roosevelt said we should educate our mind, body, and character because anyone, probably in a few years will decide the destinies of the nation.