On Procession and Return
The 16th Council of Toledo, held in AD 693, gave us (among other things) the following: 296 Let the designation of this "holy will"-although through a comparative similitude of the Trinity, where it is called memory, intelligence, and will-refer to the person of the Holy Spirit; according to this, however, what applies to itself, is predicated substantially. For the will is the Father, the will is the Son, the will is the Holy Spirit; just as God is the Father, God is the Son, God is the Holy Spirit and many other similar things, which according to substance those who live as protectors of the Catholic faith do not for any reason hesitate to say. And just as it is Catholic to say: God from God, light from light, life from life, so it is a proved assertion of true faith to say the will from the will; just as wisdom from wisdom, essence from essence, and as God the Father begot God the Son, so the Will, the Father, begot the Son, the Will. Thus, although according to essenc...