Hans Haacke, 1966

. . . make something, which experiences, reacts to its environment, changes, is . . . nonstable . . .
. . . Make something indeterminate, which always looks different, the shape of which cannot be predicted precisely . . .
. . . make something, which cannot “perform” without the assistance of its environment . . .
. . . make something, which reacts to light and temperature changes, is subject to air currents and depends, in its functioning, on the forces of gravity . . .
. . . make something, which the “spectator” handles, which he plays and thus animates it . . .
. . . make something, which lives in time and make the spectator experience time . . .
. . . articulate something natural . . .

Hans Haacke, 1966