In winter at low tide along the coast of Northern California, the world briefly rearranges itself. The ocean pulls back farther than usual, revealing slick stone and shallow basins of water cupped in rock. Crabs scuttle sideways across the exposed ground, disappearing into crevices. Anemones unfurl their soft tentacles, open and exposed, swaying gently in the shallow pulse where the water has not fully receded. Mussels cling in dense, dark bands to the craggy rocks protruding from the ground, so plentiful that from a distance the rock reads as a living mass rather than stone.
Nothing here is new. It is simply newly visible. Low tide does not create life. It pulls back the curtain on what has been there all along — an entire ecosystem sustained beneath the surface, continuing whether we can see it or not.
Standing amid all that exposed life, it becomes hard not to feel that the world is fuller than it usually appears. It is striking, then, that the prophet Isaiah describes divine knowledge not as something revealed, but as something covered: “The earth is filled with the knowledge of God as the waters cover the sea.” (Isaiah 11:9)
We often hear this verse as an image of saturation — divinity everywhere, nothing untouched. But standing at the edge of the receding tide, the metaphor opens in a different direction. Knowledge here is not what flashes into view or demands attention. It names instead what endures beneath the waters. “Covered,” in this sense, does not mean absent. It means held. Preserved. Sustained beyond sight.
Tu Bishvat, the Jewish new year of the trees, arrives in precisely this register. In many climates at this time of year, the trees look bare. The landscape appears dormant. And yet sap is rising — through channels too small to see — carrying energy, sweetness, life force. It moves what is stored deep in the roots upward toward the branches, preparing buds that have not yet emerged. We are deep in winter, and yet something has already begun. Life is moving beneath the bark, beneath the soil, beneath the surface.
We often mark Tu Bishvat with what can be seen and tasted: the bounty of fruits on the table and sweetness on the tongue. But the day itself does not celebrate harvest. It honors trust: the knowing that life is already in motion even when the evidence — the fruit, the sweetness, the visible gift — has not yet appeared.
The Hebrew month of Shevat, in which this holiday falls, carries its own quiet instruction. In Jewish tradition, its astrological symbol is the bucket, gathering what cannot be accessed from above. Sap must be tapped and collected slowly, drip by drip. Mussels, too, are gathered at low tide, when what is usually submerged can finally be reached. The bucket is not an instrument of force or speed. It is a tool of descent, patience, and care.
This feels like an essential practice right now.
There are moments when the surface of things feels overwhelming, when what is most visible presses in on us from all sides. Low tide offers a different way of orienting ourselves in such moments. It reminds us that the surface is not the whole story.
At high tide, life does not disappear when it is submerged. It awaits conditions that allow it to be glimpsed. What endures does so beneath the surface: in shared roots, in networks of interconnection, in slow, collective adaptation shaped over time.
Isaiah names this truth without spectacle. The earth, he tells us, is already full of divine knowing and sustaining wisdom, whether or not we are able to perceive it. That fullness does not depend on calm conditions, nor is it erased by chaos. Like sap rising through winter trees, like tide pools breathing beneath the waves, it moves according to rhythms older than fear and force.
Tu Bishvat does not ask us to hurry the sap or force fruit from bare branches. It asks us to trust the hidden processes that bring forth future growth. It teaches us how to wait, how to gather, how to draw nourishment from depths we do not control.
As the sun sets and the tide begins to return, the pools slowly refill. The anemones close. The mussels disappear again beneath the waterline, and under the water, the crabs can no longer be seen. What was briefly visible is covered once more. But nothing has been lost. Life continues, held beneath the surface, ready for the next moment when the waters recede and we remember where to look.
This article initially appeared in My Jewish Learning’s Shabbat newsletter Recharge on January 31, 2026. To sign up to receive Recharge each week in your inbox, click here.
