He taught them where to carve the dead parts so the rest could live, to find its flow and tap its sap.
With every mistake the mentor took each student by the hand on a short walk to the middle of the forest
where it slopped into pools thick with inky water, where the mist often got trapped between light and dark.
He mixed water and mud and pressed it into their chest, took a sharp branch and gently scratched his secret words into them, until it became a tattoo.
He then gave each a bag of seeds and a canteen of pool water, guided them back to their errant tree, chanted for them to mix both into the thirsty soil until it no longer screamed for inspiration.
The students repeated this every day, watching the grass bloom infinite variations, discovering their tongues speak at first his and then their secret words until they knew all of them, even those yet to be spoken.