It is not a pain to give to ingrates, but it is an intolerable one to be obliged to a dishonest man.

4867. There cannot be a more intolerable Thing than a fortunate Fool.

A man may be ungrateful but is less chargeable with ingratitude than his benefactor.

A prosperous fool is a grievous burden.

Poverty is not a disgrace, but it's terribly inconvenient

Ce n'est pas un grand malheur d'obliger des ingrats, mais c'en est un insupportable d'être obligé à un malhonnête homme.

Too great haste to repay an obligation is a kind of ingratitude.

A trifling debt makes a man your debtor; a large one makes him an enemy.

You can’t boldly say you have succeeded in life till you help someone who can never pay you back.'''

We should not, certainly, punish other people in general because of an apparent lack of gratitude on the part of some. It could be that people are so busy they seem ungrateful — or they actually are thankless! But this is OK — I'd rather be nice to someone spoiled than mean to someone who really could use a hand.

The more gifted by nature is a man, the more is deplorable the abuse that he does by using them to shameful ends. A swindler or crook of higher condition is more blameworthy than a vulgar scoundrel; an intelligent evil-doer, having benefited from a higher education, represents a more saddening phenomenon than an unfortunate illiterate fellow having committed an offence.

You have not lived today until you have done something for someone who can never repay you.