All the animals of creation view the world through their senses. They know only what they see, smell, hear, touch and taste. Their world is bounded by immediate perception.
Man is different.
The very essence of man, for that is his name, his defining quality, is his imagination . Man can fly above mere physical perception and travel to the ends of space and time - in his mind. Only Man can take what he perceives and compare, analyze and extrapolate. This is the comparison between man and his Creator. Thus, it is only fitting that Man should not only perfect his actions, but also his body.