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.
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Romans 12:1-4
Tyndale Open Study Notes (CC BY-SA 4.0).
12:2 this world (literally this age): The division of history into two ages was typical of the Jewish worldview. Early Christians adapted this point of view, identifying the coming of Christ as the time when the new age of salvation began. Unexpectedly, however, the new age did not bring an end to the old age. The old way of thinking and living continues, and it is a source of temptation even to Christians who seek to conform their lives to the values of the new age.
Other Bible passages linked to this one, most cited first.
As obedient children, not fashioning yourselves according to the former lusts in your ignorance:
That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; And be renewed in the spirit of your mind; And that ye put on the new man, which after God is created in righteousness and true holiness.
Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.
And have put on the new man, which is renewed in knowledge after the image of him that created him:
Love not the world, neither the things that are in the world. If any man love the world, the love of the Father is not in him. For all that is in the world, the lust of the flesh, and the lust of the eyes, and the pride of life, is not of the Father, but is of the world. And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.
Wherefore be ye not unwise, but understanding what the will of the Lord is.
Authorship: the book itself or Christian tradition. Approximate dates, as in Carson and Moo, An Introduction to the New Testament, and Longman and Dillard, An Introduction to the Old Testament.