What it all meant, Huxley thought, was that Bergson and the English philosopher C. D. Broad had been correct when they suggested that the brain operated as a vast reducing valve, "shutting out most of what we should otherwise perceive or remember at any moment, and leaving only that very small and special selection which is likely to be practically useful." Like the Freudian ego, this reducing valve was constantly beset by the raging tides of Mind-At-Large, which was what Huxley called Jung's archetypal unconscious plus Freud's pathological unconscious plus Myer's treasure house plus all the other unconsciousnesses yet to be named. And like Freud's ego, this reducing valve was not watertight: its seal was susceptible to pressure.