A Gnostic is one who holds and believes in a special knowledge or awareness of their self.
Gnostic concepts are difficult to grasp.
It would be far more accurate to describe Gnosis as a process or mindset rather than a passive piece of information. Gnosis is primarily formed by our direct experience of the world and revealed knowledge about our spiritual origin. It is akin to existentialism in that it takes into account how we feel about our lives and the questions that arise as a result of living in this world. This knowledge exists within each of us - we can know it without faith in a doctrine or religious dogma. This knowledge is difficult to attain because of the nature of the world itself.