The great Wu Style Taijiquan Master Ma Yueh Liang said it took him 10 years to “discover” qi and the rest of his life to learn what to do with it (Bill Moyers, “The Mystery of Chi,” 1993). We’re all involved in a similar progression of discovery and discerning activities that bring qi into our daily routine.
The real change from a tai chi perspective is in the mind. We think it’s the body because that’s where the problem shows. The pain in there so we think the cause is there.
We have to shift something in our perception in order for the body to make the necessary changes it needs to heal and strengthen.
I suspect that we “discover” qi because it announces itself by virtue of dislodging and flowing, which in turn results from practicing tai chi movement.
You can view many video clips of Master Ma on youtube. I have one of him from many years ago on my website.