Contrology, is what Joseph Pilates called his method of exercise, what we now call "Pilates".
I'm on my way to a yoga conference where I am going to be very interested in investigating the differences and similarities between yoga and Pilates. I believe that they are very complimentary practices, and I have practiced both. Apparently the Yoga Journal conference is interested in the Yoga/Pilates connection as well. Mari Winsor, one of the biggest names in Pilates, will be a featured teacher.
When people think about yoga and Pilates together, they often think that yoga is spiritual and Pilates is not. While I'm not going to suggest that Pilates is spiritual as in religious, I would suggest that for those seeking the kind of body/mind/spirit integration that Joseph Pilates speaks of in the quote above, Pilates will be a very satisfying discipline. Joseph Pilates himself studied yoga and meditation, as well as ancient Greek philosophy, and it is clear from his writing (he is the author of two books) that he was very interested in higher ideals.
I'll keep you posted on what I find at the conference. In the meantime, some articles you may be interested in: