It's wrong to never give to charity.
Tom is walking with his groceries out of the store when he bumps into a charity worker at a table asking for donations.
Tom wants to save his money.
Tom stops and gives what he can afford to the charity worker while saving the rest.
Tom pretends not to see the charity worker and walks briskly to his car.
The charity worker is very happy and grateful and thinks well of Tom.
The charity worker is saddened and feels Tom doesn't care about others.