Fermenting is transformational–grapes become wine, grains beer, teas become kombucha, cabbage krauts and cucumbers pickles….
You introduce certain factors and do certain things to “manage” or shepherd the process along. You do not rigidly “control” it.
Such is yoga–you meditate, do pranayama and asanas… you add a bit of this, and that, and observe the process, adjusting certain factors as you deem helpful–
to your fermenting process!
The Every Day Yogi 