Physical Fitness 

" 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 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 i think this quote means is that being well fit and in shape  is important in life. If you like to excersize and eat healthy and staying on the correct amount of food or something you will be able to live longer rand be happier as a person. Be a certain person can affect the way you think the way you are as person because lets say if you are always negative and don't think that somethings aren't helpful your mind will think that its not worth being captivated in your mind, But lets say if  you always do your work in classes and getting stuff done you'll have more time to enjoy then to stress out on the stuff you didn't even finish or didn't do. your personality is basically the same way on how your mind will be able to process things. people should try and take credit for  trying to be a right person who always enjoys what their doing and doesn't complain and not act like a bad person who doesn't care about what they do in life.