plain and unadorned sense and reason will do your business, you will find
yourself most grossly mistaken. As a speaker, you will be ranked only
according to your eloquence, and by no means according to your matter;
everybody knows the matter almost alike, but few can adorn it. I was
early convinced of the importance and powers of eloquence; and from that
moment I applied myself to it. I resolved not to utter one word, even in
common conversation, that should not be the most expressive and the most
elegant that the language could supply me with for that purpose; by which
means I have acquired such a certain degree of habitual eloquence, that I
must now really take some pains, if, I would express myself very
inelegantly. I want to inculcate this known truth into you, which, you
seem by no means to be convinced of yet, that ornaments are at present
your only objects. Your sole business now is to shine, not to weigh.
Weight without lustre is lead. You had better talk trifles elegantly to
the most trifling woman, than coarse in elegant sense to the most solid
man; you had better, return a dropped fan genteelly, than give a thousand
pounds awkwardly; and you had better refuse a favor gracefully, than to
grant it clumsily. Manner is all, in everything: it is by manner only
that you can please, and consequently rise. All your Greek will never
advance you from secretary to envoy, or from envoy to ambassador; but
your address, your manner, your air, if good, very probably may. Marcel
can be of much more use to you than Aristotle. I would, upon my word,
much rather that you had Lord Bolingbroke's style and eloquence in
speaking and writing, than all the learning of the Academy of Sciences,
the Royal Society, and the two Universities united.

Having mentioned Lord Bolingbroke's style, which is, undoubtedly,
infinitely superior to anybody's, I would have you read his works, which
you have, over and-over again, with particular attention to his style.
Transcribe, imitate, emulate it, if possible: that would be of real use