Taijiquan is about cultivating a mood and immersing yourself in it. Continuous and stable, you carry it through the day’s activities—as many as you can. It’s not easy to do this, but many will agree that the mood is very engaging and contagious. I can’t get much more specific without risking mutilating it trying to explain it.
You develop it in group and solo practice. Each practice is a return to cultivating it from where you last left off with it. Often, at some point after leaving class, you might forget this mood. But if you have a big enough taste of it, you’ll want to give it another try.
The more you try, the more you are able to do two things. One is to become familiar with the mood through practice and the second is improved memory. The result is that you’re carrying this mood more and more. You’re not only remembering it, you’re internalizing it. It becomes part of your viewpoint and integral to who you are, as in the case of real long-term practitioners.
It’s like anything that you do. The more you do it, the better you get and the more you get out of doing it. You perceive the external world from the point of view of that mood. It grows, matures, and strengthens. You develop speed, agility, and a greater sense of depth and breadth.