In reality, it's composed of many levels, with rewards to be found at each. That is why a beginner can reap immediate results. However, the further we progress, the lessons become increasingly more subtle and profound. It would seem the more we learn, the more the mystery grows. Only those who persist eventually see the light of understanding.
Understanding is like a buried treasure.
We find it by wanting it and looking for it. Push hands is just one of the tools we can use to dig it out. I can't think of anything that causes more heartache than these three. They are usually the instigators behind all the trouble in the world. The blessing is they fade away within the light of understanding.