JFK and the Greeks

What do y'all think of JFK and the Greek idea of the person being well-rounded with athletics, philosophy, spirituality, academics, etc.? Should a person focus and specialize early on, or first learn the basics of all these subjects? Are they all connected in a way?

I know someone who is smart in his major, athletic, poetic, musical and religious. I wish I could be like that. My lungs pop if I try to go up too many stairs! And poetry is a near impossibility to me sometimes....