Whether favors should be withheld from the ungrateful?

Objections

Objection 1 : It seems that favors should withheld from the ungrateful. For it is written (Wis. 16:29): "The hope of the unthankful shall melt away as the winter's ice." But this hope would not melt away unless favors were withheld from him. Therefore favors should be withheld from the ungrateful.
Objection 2 : Further, no one should afford another an occasion of committing sin. But the ungrateful in receiving a favor is given an occasion of ingratitude. Therefore favors should not be bestowed on the ungrateful.
Objection 3 : Further, "By what things a man sinneth, by the same also he is tormented" (Wis. 11:17). Now he that is ungrateful when he receives a favor sins against the favor. Therefore he should be deprived of the favor.