Romans 12:2 (BSB)

Do not be conformed to this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what is the good, pleasing, and perfect will of God.

From Romans 12. Also in the ESV.

Commentary on Romans 12:2

• John Calvin (Reformed), Calvin's Commentaries on Romans 12:2: 2. And conform ye not to this world, etc. The term world has several significations, but here it means the sentiments and the morals of men; to which, not without cause, he forbids us to conform. For since the whole world lies in wickedness, it behooves us to put off whatever we have of the old man, if we would really put on Christ: and...
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Romans 12:1-21: We may observe here, according to the scheme mentioned in the contents, the apostle's exhortations, I. Concerning our duty to God, We see what is godliness. 1. It is to surrender ourselves to God, and so to lay a good foundation. We must first give our own selves unto the Lord, Co2 8:5. This is here pressed as the spring of all duty and obedience, Rom 12:1, Rom 12:2.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Romans 12:2: And be not conformed to this world,.... By this world is meant, either the Mosaic dispensation, and Jewish church state, so called in opposition to , "the world to come", the Gospel dispensation; in which there were a worldly sanctuary, and the rites and ceremonies of which are styled the rudiments and elements of the world; to which believers in the present state are by...
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on Romans 12:2: Verse 2. And be not conformed, etc. The word rendered conformed properly means, to put on the form, fashion, or appearance of another. It may refer to anything pertaining to the habit, manner, dress, style of living, etc., of others. To this world. (τωαιωνιτουτω). The word which is commonly rendered world, when applied to the material universe, is (κοσμος), cosmos.