But where does consciousness come from?

But where does consciousness come from?Scientists, theologians, and philosophers have been trying to get to the bottom of
this question for centuries—without reaching any consensus.
One recent theory is that consciousness is the brain’s imperfect
picture of its own activity.To understand this theory,it helps to have a clear idea of one important way the brain processes
information from our senses.Based on sensory input,it builds models,which are continuously updating,simplified descriptions
of objects and events in the world.