First off a persons own views determine what his actions will be when it comes to the Shadow Jedi. There is no discrimination on the shadow side, anyone regardless of views has the right to learn to use the force. A Shadow Jedi is taught from the beginning to unlearn all of his concepts about life, the value of good and evil mean nothing to a Shadow Jedi. He unlearns pain, fear, and all other inhibiting factors. A Shadow Jedi is taught that any action can have an infinite number of outcomes, knowing this makes the Shadow Jedi limitless.
There are no rules placed on the Shadow Jedi, the reason behind this is that there is no reason for the rules, Shadow Jedi live at peace with themselves whether they be dark or light, therefore they have no use for rules. The way they obtain this level of peace is to realize that there is no difference between good and evil, right and wrong, these are just perceptions of reality and not reality itself. Reality is limitless and moral less, reality in itself has room for all actions good or negative. Another interesting point is that a good action in one persons eyes can be a negative in another, and vice versa. There are an infinite number of possible outcomes and interpretations for any action, a Shadow Jedi realizes this and knows that if he takes a negative action it may just have a light effect.
A master can manipulate the outcome in many ways to achieve his goals, he can control whether or not a negative action has a light effect. The first step to learning how to use the force is finding reality. Reality is every impression you sense, it is everything and nothing is to be excluded as false, the skeptic is blind to the ways of the force, accept that nothing is impossible. Once you have done this you will be opened up to a whole new world, a world with direction and purpose. You must accept the fact that there are no rules to life. Once you have done this your mind will be free from constraints. A perfect example of this would be a woman whose child becomes trapped under a car and she temporally forgets that she can not lift the car. The mind is limitless, the only limits on the mind are those we are taught to put on them, the mind controls the body, therefore the constraints placed on the mind directly affect the abilities inherent in your own physical being. Once you have freed your mind you will be ready to be instructed in the ways to control the force.