A humane and polished people, who have more sensibility to the passions of others, can more readily enter into an animated and passionate behaviour, and can more easily pardon some little excess.
 Adam Smith, The Theory of Moral Sentiments (1759). copy citation

Context

“As long as they do not allow themselves to be transported to do any thing contrary to justice or humanity, they lose but little reputation, though the serenity of their countenance, or the composure of their discourse and behaviour, should be somewhat ruffled and disturbed. A humane and polished people, who have more sensibility to the passions of others, can more readily enter into an animated and passionate behaviour, and can more easily pardon some little excess. The person principally concerned is sensible of this; and being assured of the equity of his judges, indulges himself in stronger expressions of passion, and is less afraid of exposing himself to their contempt by the violence of his emotions.” source