"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" (Romans 12:1-2).


Let's break this down. Sacrifice means:

-to offer your body (crucify the flesh moment by moment)
-don't act like the world (enough with the rotten attitude)
-change your mind with the Word (stop reading junk and read the Word)

What are the rewards when we sacrifice ourselves?

-You please God
-You participate in worship
-You will know the good and perfect will of God. 

Questions for the reader?

How do you think Christians feel when it's time for them to present themselves as a living sacrifice? They should feel some pain!
 
Did Jesus feel pain when He sacrificed Himself on the cross? Buy yourself some pain medicine, allow the Word to kill your wicked flesh, tie yourself to the altar, and endure. Oops! I must be honest, you will never be able to find any pain medicine to numb the pain when you decide to offer yourself as a living sacrifice :(

However, after you endure, the reward is pricelss. You will reap some benefits on earth, but your ultimate reware will be ETERNAL LIFE :)