The art object is always passive in relation to its audience. It is alarmingly active, however, in relation to its creator. Far from being like a receptacle in which you, the artist, drop your ideas, and far from being like a lump of clay which you pummel until it fits your notion of an ashtray, the art object is more like an enthusiastic and ill-trained Labrador retriever which yanks you into traffic.

Annie Dillard (b. 1945) American author

Living by Fiction (1983)
    (Source)

Often paraphrased, "Art is like an ill-trained Labrador retriever that drags you out into traffic."