v. 2 " 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." Paul implies several things in this verse. We must realize that the present world system is evil and under the rule of Satan. We must stand against the prevailing and popular forms of the spirit of this world, proclaiming instead the eternal truths and righteous standards of God's Word for Christ's sake. We must despise and abhor that which is evil, love what is righteous and refuse to yield to the various types of worldliness that constantly surround the church such as greed, selfishness, humanistic thinking, political maneuvering for power, envy, hate, revenge, impurity, filthy language, ungodly entertainment, sensuality, immodesty, immorality, drugs, alcohol, and worldly companions.
We must have our minds conformed to God's way of thinking by reading and meditating on His Word. We must have our plans, goals, and ambitions determined by heavenly and eternal truths, not by this evil, temporal, and transient age. (From the Life in the Spirit Study Bible)
Whatever changes must take place in our lives, it is worth it if we are to be acceptable to God, and have His smile of approval upon us!