She points out that the human mind in its natural state may be likened to an ordinary lamp which expends energy in the form of both heat and light but in a chaotic, incoherent way which diffuses its energy over a wide area of rather limited depth.
Dr. Twemlow goes on to observe that as the individual gets into the tapes beyond Focus 3, “…there is a gradual increase in brainwave size which is a measure of brain energy or power.”