Because man is made in the image and likeness of God, his desire for them, though they are flesh, is to give preeminence to the things pertaining to the spirit - his children to be like their Father. This is the purpose of the word. To give man, who experiences and observes life in the natural, spiritual protocols that they enact and recite every moment of every day. However, man, though he was made in the image and likeness of God, his desire, as he choose to heed the voice of the devil, is to give preeminence to the things pertaining the flesh.