The struggle between the flesh and spirit natures of man is the most common to human experience. It is an imperative.
Flesh expresses itself and functions through three primary appetites.
These two words identify the gods of this world. Defining the nature and function of the flesh as being very distinguishable from the nature of the spirit. The appetites without Christ cannot function in a pleasing manner to God. To take away the loneliness of man through a marriage between husband and wife in a conjugal relationship. To reproduce and multiply the human race.