# Get behind me, Satan! You are a stumbling block to me

"Get behind me, because you are acting like Satan! You are a stumbling block to me" or "Get behind me, Satan! I call you Satan because you are a stumbling block to me" 

# Get behind me

"Get away from me"

# you do not think about the things of God, but about the things of people

"you do not think about what God thinks is important; instead, you only thing about the things that people think are important"