Abstract

Logos, generally regarded as the basic principle of the operating world, seems to be closely tied up with development of human being. With the evolutionary history of human, logos evolves into three different dimensional expressions, namely reason, rationality, and reasonableness. In different historical periods, each expression of logos has their own glory days respectively. In the age of ancient Greek sages, reason referred to the whole range of subjects from geometry argumentation to rhetoric. Later on, there emerged a superiority on theoretical abstraction and logical deduction, which was called the dictatorship of rationality. Yet it was found that the bureaucratization of learning had created as many problems as it solved. In recent decades, the years had seen a revived interest in substantial arguments in medical ethics, ecology, and other practical fields. However, we are not inclined to regard reasonableness as a way that it can cure once and for all the crisis of our times. Based on the imperfection of each variant and indeterminacy of the topic, we attempt to track back to logos in a more comprehensive perspective, corresponding to diversity of human activities and modern social production way of life.