[Sidenote: p. 209.] 19. Let us see then what the Sethians say.[249] They are of opinion[250] that there are three definite principles of the universals, and that each of the principles contains boundless powers. But what they mean by powers let him judge who hears them speak thus: Everything which you understand by your mind or which you pass by unthought of, is formed by nature to become each of these principles, as in the soul of man every art which is taught. For example, he says, that a boy will become a piper if he spend some time with a piper, or a geometrician if he does so with a geometrician, or a grammarian with a grammarian, or a carpenter with a carpenter, and to one in close contact with other trades it will happen in the same way. But the substance of the principles, he says, are light and darkness; and between them there is uncontaminated spirit. But the spirit which is set between the darkness below and the light on high, is not breath like a gust of wind or some little [Sidenote: p. 210.] breeze which can be perceived, but resembles some faint perfume of balsam or of incense artificially compounded, as a power penetrating by force of a fragrance inconceivable and better than can be said in speech. But since the light is above and the darkness below and the spirit as has been said between them, the light naturally shines like a ray of the sun on high on the underlying darkness, and again the fragrance of the spirit having the middle place spreads abroad and is borne in all directions, as we observe the fragrance of the incense burnt in the fire carried everywhere. And such being the power of the triply divided, the power of the spirit and of the light together is in the darkness which is ranged below them. But the darkness is a fearful water, into which the light with the spirit is drawn down and transformed into such a nature (as the water).[251] And the darkness is not witless, but prudent completely, and knows that if the light be taken from the darkness, the darkness remains desolate, viewless, without light, [Sidenote: p. 211.] powerless, idle, and strengthless. Wherefore with all its sense and wit it is forced to detain within itself the brilliance and spark of the light with the fragrance of the spirit. And an image of their nature is to be seen in the face of man, (to wit) the pupil of the eye dark from the underlying fluids, (and) lighted up by (the) spirit. As then the darkness seeks after the brilliance, that it may hold the spark as a slave and may see, so do the light and the spirit seek after their own power, and make haste to raise up and take back to themselves their powers which have been mingled with the underlying dark and fearful water.[252] But all the powers of the three principles being everywhere boundless in number are each of them wise and understanding as regards its own substance, and the countless multitude of them being wise and understanding, whenever they remain by themselves are all at rest.