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Dr. Robert Koch, in the minds of many the foremost scientist and physician of living Germans, is in manner of life the personification of simplicity. His demeanor is said to be so plain and free from self-assertion that, by comparison with him, certain others of his confréres of the Berlin profession appear haughty and unapproachable. As an illustration of Dr. Koch's habits, it is said that when he travels he is quite as apt to be found taking a third-class railway ticket as any other, while the majority of his students would consider their dignity compromised by anything less than a second-class passage. In other matters as well are indicated attributes of mind and character which place him in the right line of descent from the great Boerhaave, whose favorite motto was "Simplex sigillum veri." And this is the legend that is graven on his monument in the St. Peter's
SIMPLICITY THE SEAL OF TRUTH.. JAMA. 1890;XIV(11):385. doi:10.1001/jama.1890.02410110025005