Life is a struggle, from the agonies of birth to the railing against death. Devour or be devoured. The law of the wild.
We begin life with the natural, next we come into the spiritual; but then, when we have truly received the kingdom of God and His righteousness, the natural is added to the spiritual, and we are able to receive the gifts of His providence and the blessings of life without becoming centered in them or allowing them to separate us from Him.