Ignorance in so far as it is a positive attribute is far from being a mark of imperfection. It is a true paradox that ignorance like obliviscence forms part of the process of human cognising. Probably in the truth of things memory is of the essence of mind. Thoughts naturally and spontaneously reproduce themselves. The past of experience tends automatically to carry forward into the present. The function of the brain then, or of a mental faculty intimately co-operating with the brain is to discriminate, to sift and select, to prolong into present consciousness what is of importance for action and to relegate the irrelevant to partial or total oblivion. From this psychological standpoint ignorance and obliviscence are seen to be achievements of the intellect. The presence of all facts in a human consciousness is unthinkable. If it were possible, it would paralyse action. If we exempt Christ from the law of ignorance and obliviscence, we _ipso facto_ dehumanise his cognition. When we say that Jesus was ignorant of much scientific truth, or that his prescience was limited, we do not compromise His dignity. We simply assert the naturalness of His intellect and the true humanity of that element of His nature. To do otherwise, to claim omniscience for His human intellect is gross monophysitism. His knowledge was deeper, surer, more penetrating than ours, because the light of His divine intuition streamed through the veil of sense and illumined the lower phases of intelligence. This is an instance of the _communicatio idiomatum_. The properties of the two natures act and react upon one another. But we must make the distinction of natures our starting-point, or fusion will take place. There must be _idiomata_ first, or the _communicatio_ is meaningless. THE PRESENT EXISTENCE OF CHRIST'S HUMAN NATURE