28 “Everithing is a poison, nothing is a poison, the dose alone is the poison” P.A. Paracelsus ( )In this portrait Paracelsus is shown surrounded by various philosophical symbols, including his famous sword. From Paracelsus: Etliche Tractaten, zum ander Mal in Truck auszgangen. Vom Podagra und seinem Speciebus (Coln, 1567). Washington University Collection. (http://www.nlm.nih.gov/exhibition/paracelsus/paracelsus_1.html)
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