If any man from a cold insensibility, or narrow selfishness of temper, is unaffected with the images of human happiness or misery, he must be equally indifferent to the images of vice and virtue
 David Hume, An Enquiry Concerning the Principles of Morals (1751). copy citation

Context

“Not to mention, that, while every man consults the good of his own community, we are sensible, that the general interest of mankind is better promoted, than any loose indeterminate views to the good of a species, whence no beneficial action could ever result, for want of a duly limited object, on which they could exert themselves.] If any man from a cold insensibility, or narrow selfishness of temper, is unaffected with the images of human happiness or misery, he must be equally indifferent to the images of vice and virtue: As, on the other hand, it is always found, that a warm concern for the interests of our species is attended with a delicate feeling of all moral distinctions; a strong resentment of injury done to men;” source