Definition.com
Speaking is distinguished from talking in that a fool may talk, but a wise man speaks.
Definition.com
Speaking is, along with thinking, a way to undertake to clarify things, forcing us to exacerbate them, dislocate them, schematize them. Every concept is in itself an exaggeration.
Definition.com
Speaking is to be in a position to use a certain syntax, to grasp the morphology of this or that language, but it means above all to assume a culture, to support the weight of a civilization.
Definition.com
Speaking is done according to rules, just as thinking is done according to nature, and action is done according to custom.
Trivia.com
Speaking is mechanically complicated --- you use 72 different muscles while speaking