The Unknown

Knowledge, is that which is thought to be known at the time about our reality. It is a speck or minute portion of the unknown. And when more of the unknown is known, that which was once known, becomes obsolete or proven wrong. For instance, the Earth, was once known, to be flat, and that the sun revolved around It. We now know, that the sun does not rise nor set, even though most yet use these terms.. Therefore, when one claims to know, and or be an expert, it surely means that they do not know. I do know, that I don't know. This, I know well.