"Physical fitness is not only one of the most important keys to a healthy body, it is the basis of dynamic and creative intellectual activity. The relationship between the soundness of the body and the activities of the mind is subtle and complex. Much is not yet understood. Be we do know what the Greeks knew: that intelligence and skill can only function at the peak of their capacity when the body is healthy and strong."- President John F. Kennedy

What this quote is saying is that the more your body is healthy the smarter you are. What it is also saying is that being smart and having good life skills it comes from the body that is healthy and strong