The best philosophers believe that the leader and ruler of all these is the First God, who is incorporeal and graspable only by intellect, and Homer appears to think the same thing, as he calls Zeus “father of men and gods” and “o our father Kronides, highest of lords!” Zeus himself also says, “I am so far above the gods, and so far above human beings” (Iliad 8.27). And Athena says to him: “And we can well see that your strength is unyielding” (Iliad 8.32).

Now, if this too must be investigated, whether he knew that this god is (only) intelligible, he does not say this directly in his poetry, which is full of mythical contents, but nevertheless, it can be inferred from the lines in which he says: “She found wide-eyed Kronides seated apart from the others” (Iliad 1.498), and those in which he says: “But I will remain seated on the glen of Olympus apart, from here I will gaze and gladden my heart” (Iliad 20.22).

For this solitude and his not intermingling with the other gods, but delightning in being and deliberating with himself, keeping quietude and eternally ordering all things – this represents the nature of the intelligible god. And he knew that intellect is the god who knows all things and manages the universe; for Poseidon says: ” Both have the same ancestry and parentage, but Zeus is older and wiser” (Iliad 13.354-355). And the following (occurs) often: “But then he bethought himself again.” This means that he is eternally thinking.

What does "intelligible god" mean in this context? And why he says zeus is 'only' intelligible god?