“I remember that when three years ago we had a friendly converse as to the best mode of expounding Scripture, the plan which especially pleased you, seemed also to me the most entitled to approbation: we both thought that the chief excellency of an expounder consists in lucid brevity. And, indeed, since it is almost his only work to lay open the mind of the writer whom he undertakes to explain, the degree in which he leads away his readers from it, in that degree he goes astray from his purpose, and in a manner wanders from his own boundaries. Hence we expressed a hope, that from the number of those who strive at this day to advance the interest of theology by this kind of labour, some one would be found, who would study plainness, and endeavour to avoid the evil of tiring his readers with prolixity. I know at the same time that this view is not taken by all, and that those who judge otherwise have their reasons; but still I cannot be drawn away from the love of what is compendious” (The epistle dedicatory from John Calvin to Simon Grynaeus).
This is not a blanket-endorsement of John Calvin, but his comments on lucid brevity, prolixity, and that which is compendious can be applied to all kinds of writing and even to audible speech.