原文 (英語)

SECTION II. OF THE PRINCIPLES OF SELF PRESERVATION. If in human nature there are qualities by which it is distinguished from every other part of the animal creation, this nature itself is in different climates and in different ages greatly diversified. The varieties merit our attention, and the course of every stream into which this mighty current divides, deserves to be followed to its source. It appears necessary, however, that we attend to the universal qualities of our nature, bef