the book describes the three states of consciousness from yoga science which were perhaps first documented in patañjali's yoga sutra's: dhyāna, dhāraṇā, and samadhi. emphasis is placed upon the ability to control these states of consciousness, and thus avoid "sowing" in to one's consciousness, the "seeds" of thoughts which enter without the operation of one's will (only to cause un-willed thoughts to return again later and thus increase the likelihood of producing action and a further binding to one's conditionings).