Yoga concentration and meditation (BKS Iyengar)
A friend who is a yoga instructor shared this post on Facebook:
(She doesn't work there, she just shared this post.)
This post reminded me of some of the exercises we practiced in Mexico a few years ago. Once you become advanced in yoga, you start getting into exercises where you attempt to control different things in your body. A simple example is your breathing.
When we were in Mexico, one breathing exercise our instructor had us practice was breathing in and out through only one nostril at a time. We'd practice breathing in and out the right nostril, and then do the same with the left. You didn't use your hands to close a nostril, you just did this through concentration.
With my physiology it was very easy to breathe in and out through the right nostril, but it took a lot of effort to get anything going on the left side. Everyone is different, but that was my situation.
This was just one of many practices, but when Mr. Iyengar states that, "Today my cells speak to me ... This is concentration and meditation", these are the sort of exercises that lead to that mental state.