On Benefits Book III, XIII

It may be argued that “we render men less willing to confer benefits by not supporting the claim of those which have been bestowed to meet with gratitude, and by not punishing those who repudiate them.”

But you would find, on the other hand, that men would be far less willing to receive benefits, if by so doing they were likely to incur the danger of having to plead their cause in court, and having more difficulty in proving their integrity.

This legislation would also render us less willing to give: for no one is willing to give to those who are unwilling to receive, but one who is urged to acts of kindness by his own good nature and by the beauty of charity, will give all the more freely to those who need make no return unless they choose.

It impairs the credit of doing a service, if in doing it we are carefully protected from loss.