Another way to look at this is to imagine each human being creates levels of doubt, disbelief ,and fear that cover the base perception of truth and then, multiple layers of truth. Some people evolve to remove more layers of fear and doubt than other people. Every person has the potential and capacity to eliminate all of their own veils yet not everyone is emotionally ready to do this all at once, in stages or, even at all. This is why each person experiences a very personal process. Not everyone realizes or chooses to realize this process is part of a bigger process that relates to universal consciousness. That is another layer of truth.