In all determinations of morality, this circumstance of public utility is ever principally in view; and wherever disputes arise, either in philosophy or common life, concerning the bounds of duty, the questions cannot, by any means, be decided with greater certainty, than by ascertaining, on any side, the true interests of mankind. If any false opinion, embraced from appearances, has been found to prevail; as soon as farther experience and sounder reasoning have given us juster notions of human affairs, we retract our first sentiment, and adjust anew the boundaries of moral good and evil.
David HumeGrief and disappointment give rise to anger, anger to envy, envy to malice, and malice to grief again, till the whole circle be completed.
David HumeThe mention of one apartment in a building naturally introduces an enquiry or discourse concerning the others: and if we think ofa wound, we can scarcely forbear reflecting on the pain which follows it.
David Hume