Of whom do you testify off?

There are many who go to church and yet struggle to believe God's word, because they can't see or understand what the will of God is.
Apostel Paul gave us pointers as to why and how we should authentically worship God in Rom 12:1-2
1. Recongnise that God owes you nothing, but in view of His mercies to you
a. Present your bodies as a living sacrifice
b. Live Holy (morally blamless)
c. Don't live according to the custom and pattern of this age.
d. Be transformed (changed) in your mind
Then you will be in the position to prove that the will of God is
a. Good
b. Right
c. Perfect

Conlusion
You will never understand true worship that stem out relationship, non will you understand His acts if you fail to offer yourself as a living sacrifce or holy before the Lord.
Mind you the Apostle was addressing believers, so you don't have an excuse to say that you are under grace.
It's your call to live Holy and be transformed in your mind.