In Rom. 12:1 the word 'service' carries the idea of 'worship.' The idea is not foreign to us. Some churches advertise their services like "Morning Worship," some say "Morning Service," yet others would even say "Morning Worship Service." I am not suggesting that one is right over another, but rather service does mean worship. God is interested in worship. Jn. 4:23-24 teaches us that He is seeking for worshippers. Everytime the curtain of Heaven is pulled back and we get a glimpse of what is going on in Heaven, we see that the Lord is recieving worship (e.g. Isa. 6:1-6; Rev. 4:8-11). Every day, when we serve the Lord, we need to understand that this is part and parcel of true worship.