Book Ii., Ch. Ix.

Compare the sentence quoted on p. 268 from Hazlitt.

This means Duty. This phase will be discussed in the next chapter.

Kant's Theory of Ethics, trans. by Abbott, pp. 47-51.

In last analysis Kant is trying to derive moral enlightenment from the most abstract principle of formal logic, the principle of Identity, that A is A!

A student in an ethics class once made this remark: "Conscience is infallible, but we should not always follow it. Sometimes we should use our reason."

Compare Locke, Essay on the Human Understanding, Book I., ch. iii.

Of course, the word "rule" is often used to designate a principle--as in the case of the phrase "golden-rule." We are speaking not of the words, but of their underlying ideas.