speak in concrete terms when we use words which denote Christ’s person. They call propositions concrete which indicate the person of Christ. For the general rule among the Scholastics is that abstract terms apply to the natures and concrete to the person. They apply abstract terms, such as deity, divinity, and divine essence, to the divine nature; and such abstract words as humanity, substance, human nature, flesh, and blood to the human nature. For the divine nature they have such concrete terms