All thinking keeps one's awareness out of the Overself. That is why even thinking about the Overself merely produces another thought. Only in the case of the sage, who has established himself in the Overself, is thinking no barrier at all. In this case, thinking may coexist with the larger awareness. So it is not enough to be a good thinker; one also has to learn how to be a good non-thinker. Of course, the way to do this is through the practice of meditation.
Source: The Notebooks of Paul Brunton