Intelligence is not only a knowing faculty, but is creative at the same time. The whole of manifestation is the creation of the intelligence. Time and space are both nothing but the knowledge of the intelligence. The intelligence confined to this knowledge becomes limited, but when it is free from all knowledge, then it experiences its own essence, its own being. It is this which the Sufi calls the process of unlearning, which purifies and makes the intelligence free from knowledge. It is the glimpses of this experience which are called ecstasy; for then the intelligence has an independent joy which is true happiness.