A sluice is a water channel controlled at its head by a gate. The water that flows in a sluice can power a mill.
I think of this site as a sluice.
My ideas are stored up in a reservoir (that list of things to write about).
The ideas flow out in these posts, like water through the sluice when the gate goes up.
The ideas reach a reader’s mind, where they set something spinning and, if things work as they should, get transformed into some other form of energy.
If you haven’t done so yet, you should build a reservoir of your own. And set up some sort of sluice.