i.e. in answer to his supposed inquiries.
comiti: cf. notes
to Sat. I.5. Neronis:
Tiberius, cf. I.3.2.
etc.: cf. Sat. II.3.9.
quia, etc.: i.e. not on account of the ills
to which the wealthy man is exposed.
etc.: the wealthy Romans pastured great herds of cattle on the public
lands throughout Italy, paying a small hire to the state (scriptura).
minus validus: cf. I.6.29, I.2.33 seq., I.1.102,
and many other passages where diseases of the soul are referred to.
fickle as the wind.
i.e. amicorum, his fellows.
say you are glad to hear it, as Horace himself would say
here of good fortune, in reference to his acceptability to his patron
and his companions.