A moral, philosophical discourse needs not enter into all these caprices of language, which are so variable in different dialects, and in different ages of the same dialect.
 David Hume, An Enquiry Concerning the Principles of Morals (1751). copy citation

Context

“The distinction between the heart and the head may also be adopted: the qualities of the first may be defined such as in their immediate exertion are accompanied with a feeling of sentiment; and these alone may be called the genuine virtues: but industry, frugality, temperance, secrecy, perseverance, and many other laudable powers or habits, generally stilled virtues are exerted without any immediate sentiment in the person possessed of them, and are only known to him by their effects. It is fortunate, amidst all this seeming perplexity, that the question, being merely verbal, cannot possibly be of any importance. A moral, philosophical discourse needs not enter into all these caprices of language, which are so variable in different dialects, and in different ages of the same dialect. But on the whole, it seems to me, that though it is always allowed, that there are virtues of many different kinds, yet, when a man is called virtuous, or is denominated a man of virtue, we chiefly regard his social qualities, which are, indeed, the most valuable.” source