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FRAGMENTS OF A PRISONER'S DIARY
which ultimately determines all man's actions, mental as well as physical.
Except specch, practically all other physical actions are identical with men and animals. Identical physical behaviour must be produced by mental activities of similar nature. So, only the superstition, that a soul resides in human body as the source of all spiritual activities, denies power of thought on the part of lower animals. The events recorded in the ensuing story offer evidence of my intelligence. In course of iny story, you will be acquainted also with a toin-cat with much greater (xperience than mine. In him you will find ample evidence for caref:illy calculated action to outwit human enemics. You will find in him Napolconic boldness, Macchiavellian sophistication, and the cunning of a Richelieu.
As regards the other branch of spiritual life, namely, emotions, modern physiology traces thm to the secretion of chemical fluids from the ductless slands. These glands are not only common to all higher biological forms, including man, but are actually transplantablc. Practically all the intellectual and emotional activities are produced by the secretion from the thyroid glands. When these don't function well, they can be artificially stimulated to secrete the “spiritual” fluid (which is chemical, in reality) by the injection of thyroid extract prepared from the corresponding glands in the body of some animal standing near to man in 52
