In Zen-inspired haiku, the Void (Śūnyatā) can be approached not as emptiness in the sense of nothingness, but as the absence of fixed boundaries between things. The moment is allowed to appear without being possessed or explained. There is no need for a separate observer standing outside the experience; the poet, the perception, and what is perceived can become one.
This is one reason haiku can be so well suited to exploring Śūnyatā. By saying less, the poem creates an open space in which the reader can enter the moment directly. What is left unsaid becomes as important as what is spoken.
Consider this haiku:
sunset, moonrise—
held
in a heartbeat
Here, the who or what doing the holding is intentionally left open. There is no “I” watching the sky, and therefore no explicit separation between observer and observed. Rather than telling a story about someone witnessing sunset and moonrise, the haiku simply presents the moment.
At first, sunset and moonrise appear to be separate events unfolding along a timeline. Yet the phrase in a heartbeat collapses that distance. Within a single pulse of awareness, the transition from one to the other can be experienced not as two events but as one unified "moment of suchness"—things appearing exactly as they are, before the mind divides and labels them.
The missing “I” is significant, but the haiku is not without a living presence. The "heartbeat" suggests one. Yet it need not belong exclusively to the narrator. It can be "felt as a meeting point between the intimate and the immense': the small rhythm of a human life mirroring the vast rhythms of the cosmos.
The celestial and the bodily become reflections of one another. Sunset, moonrise, and heartbeat are no longer entirely separate things. Each participates in the same unfolding reality.
And because there is no “I” to own the experience, the reader is free to enter it. The poem does not tell us what someone saw; it provides the empty space in which we can see for ourselves. We bring our own awareness to the moment and, perhaps, feel the pulse within it.
In this sense, what is “held” is the Void—not an empty nothingness, but an open, pregnant silence in which distinctions temporarily fall away and everything is allowed to arise.
The haiku does not describe Śūnyatā. It leaves room for us to experience it.
Another example,
moon in water—
the ripples
where it was
L1 presents an apparently simple image: moon in water. Yet what is actually present is not the moon itself, but its reflection—a phenomenon dependent upon the moon, the water, the light, the distance between them, and the conditions of perception.
When the ripples appear in L2, the reflection disappears in L3:
the ripples
where it was
Yet nothing substantial has been destroyed. The moon remains in the sky; the water remains; the ripples arise and pass. What disappears is an appearance that never possessed an independent existence of its own. Its presence was always contingent upon particular conditions.
In this sense, the haiku evokes the paradox expressed in the Heart Sutra: “Form is emptiness; emptiness is form.” The moon's reflection has form—it can be seen, recognized, and momentarily experienced—yet it is empty of svabhāva, or inherent self-nature. It exists only through a temporary convergence of conditions.
The reflection therefore is not simply an illusion to be dismissed as unreal. It is real as an experience, but empty as an independent entity. When one of its conditions changes—the still surface of the water is disturbed—the reflection ceases to appear. Nothing has returned to some underlying metaphysical Void. Rather, the conditions that sustained that particular form have changed.
This is where the final phrase, “where it was,” becomes especially significant. The poem does not say “where the moon was” or even “where its reflection was.” The pronoun it remains deliberately unresolved. What exactly has disappeared? The moon? Its reflection? The image perceived by the observer? The poem refuses to settle the question.
That ambiguity opens a space for contemplating non-duality. Moon, reflection, water, ripples, and observer are not presented as wholly separate entities. Each exists in relation to the others. The “moon in the water” has no existence apart from those relationships; its apparent identity arises from them.
The image of water also invites a familiar Zen association with the mind. A still surface reflects clearly; when disturbed, the reflection breaks apart. Yet the haiku subtly moves beyond the idea that there is a perfectly still mind capable of reflecting some independently existing “truth.” Even the clear reflection is empty. Stillness does not give the moon a self-nature; it merely provides the conditions under which the reflection appears.
The ripples therefore do not simply destroy an illusion. They reveal its contingency.
And this is where the poem's formal economy becomes important. The final phrase, “where it was,” points toward an absence without filling that absence with an explanation. There is a cognitive gap between the vanished reflection and the place it occupied. The reader instinctively searches for the missing object, but the poem provides only water and ripples.
That gap can be understood as a poetic enactment of Śūnyatā. The reader reaches for something solid to grasp—the moon, the reflection, the identity of it—but finds nothing fixed. What remains is not nothingness, but the continually changing field of phenomena: water, ripples, light, perception.
The haiku therefore does not merely describe emptiness; its structure invites the reader to experience the letting-go of conceptual grasping. An image appears. It changes. The mind looks for what has disappeared. The poem offers no fixed answer.
What remains is not the Void as a blank nothingness, but an openness in which things arise, change, and pass away without possessing an independent self.
The moon was never truly in the water. And yet, for a moment, it was there.
