Meditational practice is the practice of enlightenment. Man wants light. He never desires darkness. So he meditates for enlightenment. He wishes that the darkness within him vanishes, is erased. As light enters, darkness is chased away. It is possible for both darkness and light to exist in one's life. Both are possible. And this is possible because the universal law operating in this world is that of transformation. Just as the constant is an eternal rule, transformation is also an eternal rule.