It is the persistence, the keeping on, on, on. If you realize that your body is shrinking, that you are contracting, that you can see that instead of your shoulders going out as they should, they’re hunching in, keep hunching in, and go on hunching in, then you’ve got to direct the energy for them to go out. You’ve got to keep directing the energy to go out, and you’ve got to keep right on at it persistently and continuously. It’s no good thinking about it for half an hour on Mondays, Wednesdays, and Fridays. It has got to be a thing that you think about, as far as possible, all the time.
Walter Carrington (“Thinking Aloud” – At Our Mother’s Knee p26)