'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. But we do know what the Greeks know: that intelligence and skill can only function at the peak of their capacity when the body is healthy and strong.'' – John F. Kennedy
The body , the mind , and the spirit they all share the same factors . What he is trying to say is that fitness is not the only key to a healthy body , like for example Kobe Bryant .