In the context of the debates opposing the Greeks and the Latins on the Filioque, the question of the procession of the Spirit, or the movement by which it emanates at once from the Father and the Son, was posited in the Latin West. The realm of possible answers for such questions was delimited by a series of condemnations. The term “spriration” finally appeared in Scholastic writings in the late 12th C, designating the unknowable nature of the procession that is specific to the Spirit. It was not used dogmatically until the Second Council of Lyon (1274). This century-long delay was rife with theological debates, concerning, for example, the possibility of unity between procession and mission, until Thomas Aquinas affirmed the distinction between ad intra and ad extra procession.