That means you-- regardless of whether you worship that same god as someone else or no god at all.
And if God says "do it", it had better be done or you will find yourself trying to defy the laws of reality.
But this authority that God supposedly has . . . how does humankind receive the instructions?
Usually, through one of God's Special Agents.
Special Agents can be apostles, prophets, angels, priests, saints, or messiahs. Special Agents can also be a pastor, priest, bishop, or a pope.
Even a dumb ass can become one of God's Special Agents-- if the situation is just right.
Psychology studies have shown that people tend to readily obey any person they regard as an authority figure. People will obey even to the point of taking actions which are blatantly erroneous, reckless, and even harmful to life!
People can be unquestioning towards a figure which they regards as an agent of authority.
So what do you get when you mix the authority of God with the authority of one of his Special Agents-- and then add in devoted religious followers and an unscrupulous soul?
You get a confidence artist taking advantage of his or her victims.
The confidence that a theist has in his god's authority often extends to his Special Agent. A confidence artist will happily exploit this dynamic for filthy gain.
All at the total expense of the religious victims, er, I mean, religious followers.
But forget about the confidence artists.
How do you ever know that any person (or dumb ass) is truly a Special Agent of God?
If you need an Agent from God to know what God is saying, when does God make it clear that he has sent an Agent to speak for him? I suppose a talking ass is a fairly clear sign. But who has seen a real, talking ass nowadays.
OK, don't answer that last question . . .
At it's worst, organized religion is a huge confidence scheme.
But even when God's Special Agents are sincere and honest, how can you ever know that their beliefs are harmless? How can you be sure that their instructions won't ever hurt you and truly come down from God above?