You must learn to sit perfectly still with every muscle tense for long periods.
Various things will happen to you while you are practising these positions; they must be carefully analysed and described.
Note down the duration of practice; the severity of the pain (if any) which accompanies it, the degree of rigidity attained, and any other pertinent matters.
When you have progressed up to the point that a saucer filled to the brim with water and poised upon the head does not spill one drop during a whole hour,
and when you can no longer perceive the slightest tremor in any muscle; when, in short, you are perfectly steady and easy, you will be admitted for examination;
and, should you pass, you will be instructed in more complex and difficult practices.
