First published in 1749, Hartley's great work was abridged by Priestley in 1775 and reissued as a whole by Joseph Johnson in 1791. To Priestley, who founded his Unitarianism on the Observations, it seemed that Hartley was the greatest of human beings with the single exception of Jesus. Coleridge adopted his associationist theology in the mid 1790s, naming his eldest son David Hartley Coleridge, and passing on to Wordsworth the theory of mind that underlies 'Tintern Abbey', the early Prelude and (...) the 1800 Preface to Lyrical Ballads. An indispensable book. (shrink)

The orphaned son of an Anglican clergyman, David Hartley (1705–57) was originally destined for holy orders. Declining to subscribe to the Thirty-Nine Articles, he turned to medicine and science yet remained a religious believer. This, his most significant work, provides a rigorous analysis of human nature, blending philosophy, psychology and theology. First published in two volumes in 1749, Observations on Man is notable for being based on the doctrine of the association of ideas. It greatly influenced scientists, theologians, social reformers (...) and poets: Samuel Taylor Coleridge, who named his eldest son after Hartley, had his portrait painted while holding a copy. In Volume 1, Hartley utilises Newtonian science in his observations, presenting his theory of 'vibrations'. Volume 2 is particularly concerned with human morality and the duty and expectations of mankind. Hartley is keen to show that scientific observation is not necessarily in conflict with religious conviction. (shrink)