Consider this:
If a deity is considered a "good" deity, and it is expected that this deity will not act outside of their "goodness", then what makes the deity "good"? If, on the other hand, a deity declares that what they do or say is good and this is the entire substance of what makes it good, then doesn't good become meaningless, and take evil with it for the same reasons?
If a deity is considered a "good" deity, and it is expected that this deity will not act outside of their "goodness", then what makes the deity "good"? If, on the other hand, a deity declares that what they do or say is good and this is the entire substance of what makes it good, then doesn't good become meaningless, and take evil with it for the same reasons?