A lamp does not flicker in a place where no wind blows; so it is with a yogi, who controls his mind, intellect and self, being absorbed in the spirit within him.
The material body has a practical reality that is accessible. It is here and now, and we can do something with it. However, we must not forget that the innermost part of our being is also trying to help us. It wants to come out to the surface and express itself.
