Romans 12:2
New International Version (NIV1984)
2 Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is — his good, pleasing and perfect will.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=Romans 12:2&version=NIV1984
NIV®