[Generation and procession are each an emanation of the essence by which it is modified. Neither of them is a creation ex nihilo. The school-men attempted to explain the difference between the two emanations, by saying that the generation of the Son is by the mode of the intellect—hence the Son is called Wisdom, or Word (Logos); but the procession of the Spirit is by the mode of the will—hence the Spirit is called Love. Turrettin distinguishes the difference by the following particulars: 1. In respect to the source. Generation is from the Father alone; procession is from Father and Son. 2. In respect to effects. Generation yields not only personality, but resemblance. The Son is the “image” of the Father, but the Spirit is not the image of the Father and Son. Generation is accompanied with the power to communicate the essence; procession is not. 3. In respect to order of relationship. Generation is second, procession is third. In the order of nature, not of time (for both generation and procession are eternal, therefore simultaneous), procession is after generation. Institutio III. xxxi. 3.—W.G.T.S.]