How does use imagery in Medieval Mystics?

The mystical experience is inherently paradoxical. A paradox is a statement that appears to be contradictory but which may also be true. Tauler, for example, writes of the Trinity as an "imageless image." Perhaps the most common paradox in mysticism describes the coexistence of rest and motion, or stillness and activity. The paradox describes the nature of the divine reality, which is at rest within itself but also actively contemplates itself and ceaselessly flows out from itself into the world.