Besides, Unity in itself is the first of all; but intelligence, forms and essence are not primary. Every form is manifold and composite, and consequently must be something posterior; for parts are prior to the composite they constitute. Nor is intelligence primary, as appears from the following considerations. For intelligence existence is necessarily thought and the best intelligence which does not contemplate exterior objects, must think what is above it; for, on turning towards itself, it turns towards its principle. On the one hand, if intelligence be both thinker and thought, it implies duality, and is not simple or unitary. On the other hand, if intelligence contemplate some object other than itself, this might be nothing more than some object better than itself, placed above it. Even if intelligence contemplate itself simultaneously with what is better than it, even so intelligence is only of secondary rank. We may indeed admit that the intelligence which has such a nature enjoys the presence of the Good, of the First, and that intelligence contemplates the First; but nevertheless at the same time intelligence is present to itself, and thinks itself as being all things. Containing such a diversity, intelligence is far from unity. UNITY AS ABOVE ALL THINGS, INTELLIGENCE AND ESSENCE. Thus Unity is not all things, for if so, it would no longer be unity. Nor is it Intelligence, for since intelligence is all things, unity too would be all things. Nor is it essence, since essence also is all things. UNITY IS DIFFICULT TO ASCERTAIN BECAUSE THE SOUL IS FEARFUL OF SUCH ABSTRUSE RESEARCHES. 3. What then is unity? What is its nature? It is not surprising that it is so difficult to say so, when it is difficult to explain of what even essence or form consist. But, nevertheless, forms are the basis of our knowledge. Everything that the soul advances towards what is formless, not being able to understand it because it is indeterminate, and so to speak has not received the impression of a distinctive type, the soul withdraws therefrom, fearing she will meet nonentity. That is why, in the presence of such things she grows troubled, and descends with pleasure. Then, withdrawing therefrom, she, so to speak, lets herself fall till she meets some sense-object, on which she pauses, and recovers; just as the eye which, fatigued by the contemplation of small objects, gladly turns back to large ones. When the soul wishes to see by herself, then seeing only because she is the object that she sees, and, further, being one because she forms but one with this object, she imagines that what she sought has escaped, because she herself is not distinct from the object that she thinks. THE PATH OF SIMPLIFICATION TO UNITY.