This is true.
This was one of the key concepts of the entire movement. According to them, there are three layers of imagination.
Answer:
The Sheave Wheel and The Hoist Cable
The Sheave Wheel is basically a pulley wheel that sits above the mine shaft. The Hoist cable passes over the wheel and then down the shaft of the mine. The Sheave Wheel also helps reduce the sliding friction of the mine cable.
Have a great day :)