And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
conform-to fashion self according to
We are not supposed to be like those of the world. We are to change our thoughts to be in accordance to that of God. We are to experience a metamorphosis from a worldly being to a spiritually-minded being. We are to renew/renovate our thoughts to be in accordance to God. It is only when we do, that we will know/understand what is good, acceptable and His will.
We can not walk around agreeing with the things of this world and saying it is God's will. This scripture shows us that God's ways are good and that they are different from the world's.