Our actions in the science of Kabbalah are similar to those of scientists. We are discovering a new world; we are correcting ourselves, and in the process of making these corrections we learn and continually evolve alongside the corrections and within them.
That is why nobody can know his future degree until he attains it. A person does not advance along a clear, open path. Nothing is revealed! Whatever a person reaches was always concealed and unintelligible until the last moment. This is how we advance.
From the 3rd part of the Daily Kabbalah Lesson 4/16/10, The Zohar