John of Salisbury on Skepticism & Medicine

John of Salisbury liked the idea of academic skepticism, which ultimately came from Plato's Academy. Let me explain. The head of Plato's Academy post-Plato was Philo of Larissa, who fled Athens for political reasons and landed in Rome. While there, Cicero (106 - 43 BCE) attended some of his lectures and learned "academic skepticism." This started with Socrates' method of posing a series of questions to someone that could undermine their firmly held beliefs. Cicero's writings were known to John of Salisbury's time, but the Greek influences not so much.

John's approach was one of "moderate skepticism": although some things could be proven "definitively" there was still room to question them. He prized the use of Rhetoric and Grammar to challenge ideas, which put him at odds with some scholars who rejected the Trivium because Grammar and Rhetoric (they felt) clashed with the third part of the Trivium, Logic.

John considered the Trivium crucial to human beings because he felt philosophical thought was the dividing line between human beings and wild animals (and human beings and less intellectually gifted human beings). The arts of the Trivium were what enabled philosophical and critical thought to contribute to the ability to socialize, to create a community, and they therefore enabled human well-being.

He had very strong opinions on the state of medicine, believing that doctors had become more interested in making money than researching the best way to care for patients. Some physicians focused on the state of the soul and its relationship to bodily health. John thought this was ridiculous since there was no way to test or prove anything involving the soul. It also "trespassed on religious belief" which he was not keen to support. He expressed that doctors should spend their time divided evenly between research and practice, because the two pursuits were currently separated and leading to two separate practices that did not support each other. He proposed what he called regularum compendium: figure out what caused the illness, figure out how to cure the illness, figure out appropriate aftercare, then figure out how to avoid the illness in the future.

There was another Latin phrase that John of Salisbury coined that influenced later times, theatrum mundi, and we'll look this topic tomorrow.

"On the Shoulders of Giants"

A 1675 letter by Isaac Newton has the line: "if I have seen further [than others], it is by standing on the shoulders of giants." This has become a saying for doing work that builds on earlier (and more fundamental) work. It was not the first time that metaphor was seen in print.

John of Salisbury in 1159 wrote:

Bernard of Chartres used to compare us to dwarfs perched on the shoulders of giants. He pointed out that we see more and farther than our predecessors, not because we have keener vision or greater height, but because we are lifted up and borne aloft on their gigantic stature.

This was in his work called Metalogicon. The Metalogicon was about the value of the Trivium (Grammar, Rhetoric, Logic). It consists of four sections that defend the Trivium against those felt that Grammar and Rhetoric were not important to the study of Logic. John would not have known Bernard, who died in the 1120s (John was a child then, going to grammar school in England). He did, however, study Rhetoric and Logic at Chartres under one of Bernard's disciples, Richard l'Evêque.

Although John attributes this to Bernard of Chartres, while John was at Chartres he also studied under William of Conches. John should have been unaware that William, in his 1123 commentary on the Institutiones grammaticae of Priscian, wrote:

The ancients had only the books which they themselves wrote, but we have all their books and moreover all those which have been written from the beginning until our time.… Hence we are like a dwarf perched on the shoulders of a giant. The former sees further than the giant, not because of his own stature, but because of the stature of his bearer. Similarly, we see more than the ancients, because our writings, modest as they are, are added to their great works.

John of Salisbury referred to himself as Johannes Parvus, "John the Little"; parvus can mean "little" or "small." he does not indicate in his writings that he was physically sort. Perhaps this was a humble moment in which he claimed to be not a giant.

A commentator on the Talmud, the Jewish Isaiah di Trans (c.1180 - c.1250) wrote:

For I heard the following from the philosophers, The wisest of the philosophers was asked: "We admit that our predecessors were wiser than we. At the same time we criticize their comments, often rejecting them and claiming that the truth rests with us. How is this possible?" The wise philosopher responded: "Who sees further a dwarf or a giant? Surely a giant for his eyes are situated at a higher level than those of the dwarf. But if the dwarf is placed on the shoulders of the giant who sees further? ... So too we are dwarfs astride the shoulders of giants.

Anyway, the phrase caught on long before Isaac Newton wrote his letter to Robert Hooke. But back to John of Salisbury. Besides defending the Trivium and the verbal arts, he had some strong opinions about things that could be proven, and some strong arguments about the medical profession of his day. I'll talk about those tomorrow.