Bobby Brown -- I Can't Pull the Plug ... God Will Save Bobbi Kristina

Bobby Brown is adamant ... he doesn't want to take his daughter Bobbi Kristina off life support because he believes in God-driven miracles.

Bobby's feelings are not shared by doctors, who have advised him she will not improve and pulling life support is an appropriate action. But Brown and his family -- who are deeply religious -- believe doctors cannot account for miracles ... miracles the family has seen before.

We're told Bobbi Kristina's condition has remained the same since Monday morning ... her brain functions are minimal and there has been no improvement.

Family sources say this has been an ongoing discussion and they believe Brown could come around to the doctor's point of view as time goes on ... but as of late Thursday he's not budging.

When his daughter was transferred to Emory University Hospital Tuesday Brown was hopeful the renowned staff could do something, but the fact that there's been no change is what doctors believe is the handwriting on the wall.