This interchange was important for Merton's subsequent expression of emptiness. Under the influence of Suzuki's equation of emptiness with fullness he began to use this motif more paradoxically. At times he wrote of the simultaneous presence of emptiness and fullness; on other occasions he identified the two. "From moment to moment," he wrote in Conjectures of a Guilty Bystander, "I remember with astonishment that I am at the same time empty and full, and satisfied because I am empty. I lack nothing." "We accept our emptying," he noted in another piece, "because we realize that our very emptiness is fulfillment and plenitude."' Later writings on Zen Buddhism also reflected the dialogue with Suzuki. Merton described sunyata as an emptiness which, because it lacks limitation, is also a perfect fullness. He drew correspondences between the Zen teaching about emptiness and Nicholas of Cusa on infinity and Saint John of the Cross on the dark night, even devoting parts of a major essay to defending Hui Neng's understanding of the void. The sixth Ch'an patriarch, argued Merton, neither regarded sunyata as possession nor as absolute negation. On the contrary, Merton felt justified in claiming that for Hui Neng "the infinite emptiness is then infinite totality and fullness." Merton was impressed by the idea that emptiness should not be conceived in absolute opposition to fullness. One should strive to move from the emptiness of interior poverty and despair to the fullness of union with God. Nonetheless, during mystical union one is both "totally empty (of separateness and material individuation) and totally full, realizing himself in unity not only with all being(s) but with the very source and finality of Being." Merton even identified contemplation itself as "the fullness experienced as truly full when it offers itself freely to us in the shape of emptiness."