From Yoe Choin's perspective, Qi is not an abstract, magical energy. He views Qi as a high-pressure fluid or high-voltage electrical current flowing through the human body's plumbing system.
If meridians are pipes, then Qi is the water flowing within them. If the pipes are strong and properly installed, this energy can be used to drive machinery with incredible power. However, if there is a blockage or leak, the system will experience mechanical failure.