Conversation:
(1) is universal;
(2) is necessary; and therefore
(3) Is it an art? (§ 2)
(4) Can it be improved?
The great difficulty is this: that it must seem to be natural, and not
an art. Hence—
(5) Analogy of the arts of logic and rhetoric (§ 3, § 4),
viz.—
(α) They can never be taught without natural gifts to receive them.
(β) They can always be greatly improved in those who possess these
gifts.
(γ) They must not be paraded, or they cease to be arts in the higher
sense, for
(δ) The highest art is to attain perfect nature.