Therefore, I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God—this is your spiritual act of worship. 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.The verses break simply into three parts: verse 1, verse 2a, and verse 2b.
Offer your bodies as living sacrifices (v. 1)
1. Sacrifice is "holy"
2. Sacrifice pleases God
3. Sacrifice is a "logical service" (in the original Greek).
4. Sacrifice costs us in various ways (financially, emotionally, physically)
Do not conform to the pattern of this world (v. 2a)
1. Conform - in Greek, to "unite one's appearance"
2. "Pattern of this world" - in Greek, an "age" or time chacterized by popular ideas / beliefs.
3. Literally means, "Do not join your appearance to the popular trends of the day" (Think Bill Clinton or Oprah Winfrey, here)
Be transformed by the renewing of your mind (v. 2a)
1. Transform - in Greek, "metamorphoo" or "change form"
2. Renewing - in Greek, implies a sense of freshness as opposed to youthfulness.
3. Literally means, "See yourself changed by the continual freshness of your mind"
Paul is describing the process of sanctification (not the event). The "change in form" is to mirror the Godly inner nature the Christian already posesses. The "freshness" of mind is the conviction of the Holy Spirit / God's Word.
Test and approve God's will (v. 2b)
1. "Test and approve" ("prove") - in Greek, means to test with the expectation of passing.
2. God's Will - God's desire (not God's sovereign will). God's desire is:
i. That you be sanctified (see v. 2a and 1 Thess. 4:3)
ii. Good - in Greek, "good by nature" (intrinsic goodness) not "good in appearance"
iii. Pleasing - "fully agreeable" (to God)
iv. Perfect - "Complete" - it's all a Christian needs for spiritual and mental well-being.