By John Piper November 30, 1997
So our spiritual worship is to come to God each day and say: "O God, there is nothing that I want more than to approve what is most worthy, and value what is most valuable, and treasure what is most precious and admire what is most beautiful and hate what is most evil and abhor what is most ugly. I reckon myself dead to all that is unspiritual and worldly and deadening to my soul. Renew me, O my God. Awaken spiritual capacities of right assessment."
And then we say, "And take me, body and soul, and make me the instrument of your glory in the world. Let the renewal you are working from within show on the outside. This is my spiritual worship. To show the world that you are my all-satisfying treasure."
There it is. Now we are back at the beginning. The essence of worship is a being satisfied in God and cherishing of Christ as gain. Romans 12:1-2 are not saying anything different. This is what it means to have a renewed mind. The renewed mind perceives and approves and treasures and cherishes the will of God (and thus transforms all of life), because it first and foremost perceives, and approves and treasures and cherishes God.
And doing the will of God is the outshining of God in his glory. "Let your light so shine before men that they may see your good deeds and give glory to your father in heaven" (Matthew 5:16). All of life is the outshining of what you truly value and cherish and treasure. Therefore all of life is worship. Either of God, or something else.
Therefore be transformed in the renewal of your mind. Cherish God in all his works and all his ways. Reckon the old mind dead and offer yourself to God as a living sacrifice that he may put you on display by the outshining of his worth and his value in your life. Worship him with your life.