Neither mystic insights, nor philosophic wisdom, nor creative power can be provided by pill or injection. The psycho-pharmacist cannot add to the faculties of the brain-but he can, at best, eliminate obstructions and blockages which impede their proper use. He cannot aggrandise us-but he can, within limits, normalise us; he cannot put additional circuits into the brain, but he can, again within limits, improve the co-ordination between existing ones, attenuate conflicts, prevent the blowing of fuses, and ensure a steady power supply. That is all the help we can ask for-but if we were able to obtain it, the benefits to mankind would be incalculable; it would be the 'Final Revolution' in a sense opposite to Huxley's-the break-through from maniac to man.