Irreversibility
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There is a gongfu rule of thumb, "one day missed, ten days lost." If you start a practice and miss a few days of practice right at the beginning, you basically lose your momentum and have to start over. If you learn something new and don't practice it the next day, it is usually lost by the third day, you'll have to re-learn it. If you have been practicing everyday for nine months and you miss three days of practice, you've basically set yourself back a month.
Chinese martial arts work by momentum, that is why discipline is so important. In English we often say, "Practice it until it becomes second nature." This is a similar idea.
Problems arise when we don't really understand why we are doing a particular practice. Kinesthetic learning often starts out with a method that is supposed to reveal some type of fruition over time. Once the fruition is revealed it can be integrated into everything we do. Sometimes this means we can drop the method. Sometimes the method is itself part of the fruition.

But discipline itself is a hook with out a worm. If the fruition does not reveal itself, or if the fruition we thought we were going to get doesn't materialize, the experiment is a failure--the discipline should be dropped. With kinesthetic practices expect to have a clear idea what fruition will eventually become irreversible after about two months. It sometimes takes a little longer to get the idea. A method can easily take two years to truly become irreversible but you should know long before that what the method is doing and how it is changing you.

The rule of thumb is this: We are doing experiments which reveal our true nature; we are not signing up for self-improvement.