This squirrel looks like it took three brush strokes to create. The only details added are tiny, but bring the biggest impact: the eyes, ears, and smoothness of the head. Without those features it would be a paisley splotch of nothing.
Great writing mirrors this concept.
The right word.
The gorgeous cadence and rhythm of a profound thought.
The connection made between author and reader because their words best describe the lingering undefined feeling haunting them.
That kind of writing is simply flawless.