Some will say writing, and writing well, is a science. Style manuals become the tools of choice, and integrity of prose gets lost in the quest for the pure science of writing.
For others, writing is an art. Like much of how we portray art, it then becomes this mythical beast that can only be summoned following exclusive rituals of your choice.
I think it is partly both. Clarity of expression is assisted by consistency of style. But meaning and resonance is often achieved by intuition and inspiration.
The key, overarching mission of any article, be that exhibition label, magazine article or annual report is "perfect clarity." As Joseph Putlizer once said: "I hate all rare, unusual, non-understandable words. Avoid the vanity of foreign words or phrases or unfamiliar terms. Editorials must be written for the people, not for a few."
Taking a dose of science and a brush of art in the pursuit of "perfect clarity" is the mission of any writer who cares about their reader.
Photo Source: Flickr Sarah Reid