The social virtues are never regarded without their beneficial tendencies, nor viewed as barren and unfruitful.
 David Hume, An Enquiry Concerning the Principles of Morals (1751). copy citation

Context

“We carry our view into the salutary consequences of such a character and disposition; and whatever has so benign an influence, and forwards so desirable an end, is beheld with complacency and pleasure. The social virtues are never regarded without their beneficial tendencies, nor viewed as barren and unfruitful. The happiness of mankind, the order of society, the harmony of families, the mutual support of friends, are always considered as the result of their gentle dominion over the breasts of men. How considerable a PART of their merit we ought to ascribe to their utility, will better appear from future disquisitions;” source