A speaker should approach his preparation not by what he wants to say, but by what he wants to learn.

There is a strange sensation often experienced in the presence
of an audience. It may proceed from the gaze of the many eyes that
turn upon the speaker, especially if he permits himself to steadily
return that gaze. Most speakers have been conscious of this in a
nameless thrill, a real something, pervading the atmosphere,
tangible, evanescent, indescribable. All writers have borne
testimony to the power of a speaker's eye in impressing an
audience. This influence which we are now considering is the
reverse of that picture—the power their eyes may
exert upon him, especially before he begins to speak: after the
inward fires of oratory are fanned into flame the eyes of the
audience lose all terror.

The crowd shouldn't dictate your performance

When speaking, be clear, be brief and be memorable.

If there's anything a public servant hates to do it's something for the public.

The stroke of the whip maketh marks in the flesh: but the stroke of the tongue breaketh the bones. Many have fallen by the edge of the sword: but not so many as have fallen by the tongue. [Ecclesiasticus 28:17 --18].