WhatshallIcallmyself said: consciousness develops as the child gains experience and memories ….
Things start even before it is child. Just like an employer instructs his employees for performing various tasks, DNA instructs the cell. And you know very well that DNA is a multi-billion-lettered program telling the cell to act in a very detailed way exactly how the person's body should develop! Interestingly neuroscientists unwittingly add another dimension to the above process because they say our brain simultaneously processes an amazing amount of information and performs amazing tasks. The human brain not only processes more than a million messages a second but also weighs the importance of all this data, filtering out the relatively unimportant. This screening function is what allows us to focus and operate effectively in our world. Such a screening or discriminating function is characteristics of an immaterial reality behind brain. That is why when the life (the source of which is soul) leaves brain becomes a decaying, foul-smelling flesh/trash. That means brain is like the hardware of the computer and consciousness is like operating systems. Of course if hardware is faulty, operating system may or may not work. This explains why we find different degree of consciousness [which could also falsely be interpreted as evolution of consciousness]. This further explains why we see an intelligence behind the brain, which expresses itself as the ability to reason, to produce feelings, to dream and plan, to take action, relate to other people, seek a higher relationship …etc. This also explains why we have great thirsts, such as thirst for unconditional love and thirst for righteousness, which cannot be satisfied by any amount of wealth or fame!