Right discrimination is of two kinds analytical and synthetical. The first leads one from the phenomena to the Absolute Brahman, while by the second one knows how the Absolute Brahman appears as the universe.
And you are entirely free from head-ache? That is good -- good -- considering it is the first spring you have been free from it since we were acquainted. I am afraid you will get so well, and fat, and young, as to be wanting to marry again.
On the subject of the nature of the gods, the first question is Do the gods exist or do the not? It is difficult you may say to deny that they exist. I would agree if we were arguing the matter in a public assembly, but in a private discussion of this kind, it is perfectly easy to do so.