“ Do not be afraid to use "good" thoughts as well as "bad." None of them represents your real thoughts, which are being covered up by them. The "good" ones are but shadows of what lies beyond, and shadows make sight difficult. The "bad" ones are blocks to sight, and make seeing impossible. ”

“ You can also use the idea for a particular thought that you recognize as harmful. This practice is useful, but is not a substitute for the more random procedures to be followed for the exercises. Do not, however, examine your mind for more than a minute or so. You are too inexperienced as yet to avoid a tendency to become pointlessly preoccupied.
Further, since these exercises are the first of their kind, you may find the suspension of judgment in connection with thoughts particularly difficult. Do not repeat these exercises more than three or four times during the day. ”