An aphorism attributed to Albert Einstein—“Everything should be made as simple as possible, but not simpler”—appears to have been derived from a longer passage in his 1933 Herbert Spencer Lecture, given in Oxford and titled “On the Method of Theoretical Physics,” in which he suggested that theories should not be so simple as to “surrender the adequate representation of a single datum experience.”Aphorisms are supposed to illustrate truisms in short, pithy maxims. However, they are not always short or pithy and do not always illustrate truisms. For example, an aphorism attributed to William Osler begins with an important injunction (“Listen to the patient …”) but continues with a misleading assertion (“… he is telling you the diagnosis”). The patient’s tale is generally incomplete and needs to be supplemented by careful questioning and followed by careful observation, examination, and investigation. The aphorism might therefore be rewritten, less pithily but more accurately: “Listen to what the patient tells you, both spontaneously and on careful questioning; the patient’s tale is the first step on the road to a complete diagnosis.”