Theologicae regulae
Alan of Lille (1120–1202)
Alan's theological rules, wherein he sets forth over a hundred concise maxims.
Prologus I: Theologicae regulae
Regula I: Monas est, qua quaelibet res est una.
Regula II: In supercoelesti unitas, in coelesti alteritas, in subcoelesti pluralitas.
Regula III: Monas gignit monadem, et in se suum reflectit ardorem.
Regula IV: In Patre unitas, in Filio aequalitas, in Spiritu sancto unitatis aequalitatisque connexio.
Regula V: Sola monas est alpha et omega sine alpha et omega.
Regula VI: Omne limitatum alpha et omega aut est bonum ab alpha, aut est bonum ab alpha et omega.
Regula VII: Deus est spaera intelligibilis, cujus centrum ubique, circumferentia nusquam.
Regula VIII: Deus est cui quidlibet quod est, est esse omne quod est.
Regula IX: Quidquid est in Deo, Deus est.
Regula X: Omnis praedicatio de Creatore facta, copulata est atque conjuncta.
Regula XI: Omne simplex esse suum, et id quod est, unum habet.
Regula XII: Nullum simplex subjectum esse potest.
Nothing simple can be a subject.
This is born from the preceding. For since in a simple thing there is no diversity, no plurality, in it there is nothing accidental, nothing substantial, wherefore it is a subject to no property. By the same reasoning, nothing is predicated of a simple thing, since to be predicated is nothing other than to inhere. For in a theological proposition it is not asked what belongs to what, but what a thing is. For when it is said God is good, it is not shown what belongs to what by instance, but rather what God is by essence. Whence no theological proposition of inherence is contingent, but is of pure being, or of necessity. For whether I say, God is, or, God is just, the proposition is of pure being. Whence Boethius, wishing to hint that a simple thing cannot be a subject, says: For it cannot be a subject.