Book excerpt: Please note: This is a companion version & not the original book. Sample Book Insights: #1 Tai Chi is a tool that can be used for many things, from physical therapy to physical fitness to dance. But it is primarily used for the internal energy it can provide, which is a natural high that far exceeds anything else. #2 PENG energy is the result of a martial artist recognizing, initiating, directing, and extending it. It can be static like a lake, or it can flow like a river or riptide. It can be a continuous stream, or come in waves. Waves are either hard breakers on the shore with whitecaps cresting and breaking, or longer, slower, and more powerful ocean swells.