It started to rain last night.
It kept on raining throughout the day. I woke up to a dark, cold and gloomy day.
Practicing Tai Chi is a good day to get the blood circulating. Some say to circulate the Chi.
Playing the Tai Chi form is a good way to train your ability to concentrate, develop awareness of how your body is moving in response to your mind.
When you can quiet down your mind you can focus so much better. In this way you can reduce the outer movements, concealing the movements that are happening inside your body. This is what we mean by being internal.
Good control of the body allows you to tread like a cat. At the same time your body is moving like a series of gears to rotate and spiral to connect to the ground to generate power.
While it does not seem like it but within the slow, seemingly gentle movements we are working the power generation process.