“There is no difference in principle between sharpening perception with an external instrument, such as a microscope, and sharpening it with an internal instrument, such mescaline, LSD, or psilocybin. If they are an affront to the dignity of the mind, the microscope is an affront to the dignity of the eye and the telephone to the dignity of the ear. Strictly speaking, these drugs do not impart wisdom at all, any more than the microscope alone gives knowledge. They provide the raw materials of wisdom, and are useful to the extent that the individual can integrate what they reveal into the whole pattern of his behavior and the whole system of his knowledge.”

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