Sentence:  "This question inquires into the first cause and highest existent ground of beings. It is the question of the <WSD>theion</WSD>, a question that had already arisen at the beginning of metaphysics in Plato and Aristotle; that is to say, arisen from the essence of metaphysics. Because metaphysics, thinking the being as such, is approached by Being but thinks it on the basis of and with reference to beings, metaphysics must therefore say (legein) the <WSD>theion</WSD> in the sense of the highest existent ground." 
Meaning of the word marked with <WSD> tags:  the divine, especially a divine fire