If the intensity of the material world is plotted along the horizontal axis, and the response of the human mind is on the vertical, the relation between the two is represented by the logarithmic curve. Could this rule provide a clue to the relationship between the objective measure of information, and our subjective perception of it?

Chapter 10, Counting Digits, The ubiquitous logarithm, p. 85 - Information, The New Language of Science (2003)