Articulation is both an art and science but must not be mistaken as a mere mastery of words or linguistics skills.
Its greatness is its ability to deliver effective communication for various occasions and on several topics.
It is because articulation I believe is the flow of thoughts and ideas that use the wings of expressions to weave appropriate and appealing patterns.
That's why all great leaders, especially political and religious ones are very articulate and they do not exercise any restraint unless for diplomatic wheedling.
Articulation with appropriate definition and adequate elaboration brings out multiple nuances and niceties like canine senses of smell and which are all cleverly and pleasantly ensconced in the colorful expressions with a beauty like the multiple shades of pavonine splendor.