If you think of Tai Chi as a language, then you are learning to say something with your body. If your bones are consonants, your joints are vowels; if you bones are nouns your joints are verbs.
In learning how the forms change from one to another, you are learning sentences; your response to any defensive situation can be as varied and creative as any verbal comeback.
Over time, your facility with words increases, as does your vocabulary. Your knowledge can increase, as can you ability to express yourself.
Once you learned to walk, and you wanted to walk to the store, you just did it. And then everytime you did it was different; on the walk to the store you paid attention to the weather, the people around, the traffic etcetera. You planned roughly what route you'd take, but you dealt with what came up.
With Tai Chi, as you learn to move you also pay attention to how your body feels, to the environment that you are in, to where you're going, to where you want to go. Over time your movements can become more sure-footed, your body stronger.
Practice, become eloquent.
[This message has been edited by DavidJ (edited 02-23-2001).]