Which opinions indeed, in my judgment, are completely rejected by following out the reasoning explained above, and by which it was shown that the cause of the diversity and variety among these beings is due to their conduct, which has been marked either with greater earnestness or indifference, according to the goodness or badness of their nature, and not to any partiality on the part of the Disposer. But that this may more easily be shown to be the case with heavenly beings, let us borrow an illustration from what either has been done or is done among men, in order that from visible things we may, by way of consequence, behold also things invisible. (Book I, Chapter 8, Part 2)

There is a human tendency to view variation as inconsistent, incoherent, unpredictable, therefore threatening, and thereby evil.

There is considerable evidence that for God diversity is a source of strength, beauty, creativity, and delight.