Dash had never once stayed still, not for a single second of her whole life.
She came rushing down from the mountains every morning, tumbling over rocks and laughing as she went, carrying leaves and twigs and the occasional surprised beetle along for the ride. She had seen waterfalls and rapids and the wide blue stretch of sea far below the valley. She had things to do and places to be, and she said so to anyone who would listen.
She remembered the roar of the big waterfall two valleys over, and the cold sting of mountain snow melting into her each spring. She remembered the salty smell of sea air, long before she ever actually reached the shore.
The valley around them was thick with ferns and old mossy stones. Tall trees leaned in from both sides, as if listening to every word the two of them said. Sunlight broke through the leaves in scattered coins of gold, landing sometimes on Dash's racing surface and sometimes on Mirror's calm one.
Mirror, who lived in the quiet clearing just beside her, listened more than most.
Mirror was a pond, round and calm, fed by a deep spring far below her surface. She had not moved from that clearing in longer than anyone could remember. She held the sky in her face all day — clouds drifting across her, birds crossing over, the moon arriving each night right on schedule. She liked watching things change without ever needing to chase them down herself.
A dragonfly could land on her glassy surface and she would hold its reflection perfectly, without a single ripple to disturb it.
"You should see the world," Dash called out one morning, foam bubbling at her edges. "There is so much more to it than this one clearing."
"I see plenty," said Mirror calmly. "The whole sky visits me every day. I don't see why I should chase it."
"Because chasing it is the fun part," said Dash, and sped off around the bend before Mirror could answer.
This was how most of their mornings went.
Some mornings Dash tried a different argument.
"Don't you ever wonder what's around the bend?" she asked.
"I already know what's above me," said Mirror. "The whole sky, every single day, seems like enough wondering for one pond."
Dash thought stillness sounded unbearably dull, like sitting in one chair for a thousand years. Mirror thought rushing about sounded exhausting, like never getting to finish a single thought before being swept into the next one. Neither of them could understand why the other lived the way she did.
The forest around them did not seem to mind the argument.
A heron named Birch came to drink from Mirror every evening, picking his way carefully along the bank. The still water made it easy to see exactly where to step. A pair of dragonflies preferred Dash, skimming low across her racing surface and daring each other to go faster.
Frogs sang from Mirror's lily pads at dusk. Fish darted through Dash's currents, riding the rush of her for the simple thrill of it.
One afternoon a family of otters arrived, sliding down Dash's slick rocks again and again just for the joy of it. They whooped and splashed every time they reached the bottom, then climbed straight back up to do it again. Mirror watched them from her quiet clearing and found herself almost wishing she had rocks of her own to slide down.
"You see?" Dash would say, when the dragonflies buzzed past. "Some creatures know what's good."
"You see?" Mirror would reply, when the frogs began their evening chorus. "Some creatures know what's good, too."
Neither of them ever quite won the argument, and neither of them ever quite gave it up.
Then, one summer, the rain stopped.
It did not stop all at once. First there were a few dry days, which nobody minded much. Then a few dry weeks, which started to feel strange. Then a full dry month, and the forest began to change in ways that worried even the animals who rarely worried about anything.
Dash felt it first, because she was always moving and motion uses things up. Her rushing slowed to a hurry, then to a walk, then to something closer to a careful trickle picking its way over rocks that used to be hidden beneath her. She had always thought of herself as endless. She was learning, slowly, that she was not.
It was a strange thing to learn about yourself in the middle of an ordinary Tuesday.
She tried rushing the way she always had, just to prove to herself that she still could. It didn't work the way it used to. She tired faster, and the rocks that used to disappear beneath her white rushing water now stuck up sharp and visible, like teeth.
"I don't understand," she said to Mirror one evening, her voice smaller than usual. "I have never run out of anything before."
Mirror did not answer right away, because she was thinking about her own water level, which had dropped enough that her edges had pulled back from the grass. Her deep spring was still feeding her from below, but even a spring can only give so much when nothing comes down to replace it.
"I am shrinking too," Mirror admitted. "Just more slowly than you."
"But why more slowly than me?"
"My spring keeps feeding me from below, even when nothing comes down from above," said Mirror. "It isn't much, but it's steady."
Dash had no clever answer for that.
The drought went on, and the forest grew quieter and more worried. Birch the heron had to walk farther each evening to reach Mirror's shrinking edge. The dragonflies who loved Dash's rushing water found less and less rush to skim across.
The frogs sang shorter songs, saving their breath for the heat. Even the trees along the bank began to droop, their leaves curling at the edges like old paper. Nobody said it out loud, but everyone in the forest was thinking the same worried thought.
One scorching afternoon, word came through the forest that a doe and her two fawns were stranded on the far ridge, cut off from any water at all. The little stream that usually ran near their meadow had dried up completely days before. The fawns were so young their legs still wobbled a little when they walked. The doe would not leave them to search alone.
Birch brought the news to Mirror, since Mirror was who he always told things to first. He had flown three times around the ridge already, looking for any water at all, and found none. His wings ached from the extra flying, but that mattered less than what he had seen.
"They need water," Birch said, "and they are too far from me to reach in time."
Mirror was quiet for a long moment, turning the problem over the way she turned over the clouds that crossed her surface.
"I can't go to them," she said finally. "I have never been able to go anywhere. But Dash is able to travel."
So Birch flew along the bank until he found Dash, thinner now than anyone had ever seen her, easing her way carefully between sun-baked stones.
"The doe and her fawns are trapped on the ridge," Birch told her. "They need water, and you're the only one who can travel."
Dash looked at her own water level, which was lower than it had ever been. She was not at all sure she had enough left in her to reach the ridge and back. But she thought about all the mornings she had spent boasting about how far she could go. She decided this was exactly the moment to find out if it was true.
"Tell me which way," she said.
Birch led her up through a dry gully that wound toward the ridge. Dash followed, narrower than a trickle in some places, barely a damp line across the stones in others. At one point she had to squeeze herself between two stones so close together she barely fit. She kept going anyway, one stone at a time.
She reached the doe and her fawns just as the afternoon heat was at its worst.
The fawns drank eagerly from the thin ribbon of water Dash had become, and the doe lowered her head and drank too, more carefully, watching her babies the whole time. It was not very much water. It was, however, exactly enough.
The doe lifted her head afterward and looked at Dash for a long moment, the way you look at someone who has done something larger than they realize.
"There's more, where this came from," Dash told them, once they had had their fill. "A whole pond, just down the gully. Follow me, and I'll lead the way."
She turned herself around — slow, careful, every drop of her counted. Then she began making her way back down toward the clearing, with the doe and her fawns following close behind. It was the longest, slowest journey of her entire life, and also the most important one.
Mirror was waiting when they arrived, her water lower than it had been in living memory, but still there, still cool and still deep enough at the center to matter.
The fawns drank first, then the doe. Birch landed beside them and dipped his beak in too, more out of relief than thirst. The whole clearing seemed to hold its breath until the last fawn had finished drinking.
Dash settled in beside Mirror, exhausted in a way she had never been exhausted before.
"You found the way," said Mirror.
"You held the water," said Dash.
Neither of them said anything else for a while, because there did not seem to be anything else that needed saying.
The rain came three days later.
It started as a few scattered drops, the kind that don't seem like much until you notice every leaf in the forest tilting upward to catch them. Then it came harder, drumming on the lily pads, filling the dry gullies, soaking down through the dirt toward Mirror's deep spring. Dash felt herself swelling back to her old rushing self within a single afternoon, foam returning to her edges, her laughter returning to her voice.
Mirror filled slowly and steadily, the way she did everything, until her edges reached the grass again and the frogs returned to singing long evening songs from her lily pads. The otters came back too, sliding down Dash's rocks with even more enthusiasm than before. It was as if they had missed the joy of it as much as Dash had missed providing it.
"I suppose," said Dash, once the rain had passed and the sun was out again, "that staying still isn't entirely useless."
"I suppose," said Mirror, "that rushing about isn't entirely exhausting."
"It saved that doe and her fawns, you holding all that water back."
"It saved them too, you finding a way to reach them at all."
They sat with that for a while, Dash chattering gently over her familiar stones, Mirror holding the afternoon sky steady on her surface.
The dragonflies came back to skim across Dash's currents. The frogs settled into their evening chorus on Mirror's lily pads. Birch returned to his careful evening walk along the bank, no longer needing to go far to find what he was looking for.
Dash still rushed past every morning, telling Mirror about distant waterfalls and the wide blue sea. Mirror still held her stillness, watching the clouds and the moon and the slow turning of the seasons. Neither of them changed who they were.
But when Dash called out about the joys of moving fast, Mirror no longer argued back quite the same way. And when Mirror spoke of the comfort of staying put, Dash found herself nodding instead of laughing.
They had each always thought there was only one good way to be water.
Dash had thought speed was the only thing worth having. Mirror had thought stillness was the only thing worth keeping.
Now they knew the forest needed exactly both.