Mt 7:6, 12-14
[Jesus said to his disciples,] 6“Do not give what is holy to dogs, or throw your pearls before swine, lest they trample them underfoot, and turn and tear you to pieces.12“Do to others whatever you would have them do to you. This is the law and the prophets.
“Enter through the narrow gate; for the gate is wide and the road broad that leads to destruction, and those who enter through it are many. 14How narrow the gate and constricted the road that leads to life. And those who find it are few.”
Do to others whatever you would have them do to you. A newly married woman was to live with her mother-in-law. On the outset she noticed that her mother-in-law was a little devil. The mother-in-law saw nothing right about her whatever she did in the house. Disturbed and devastated, the young wife went to a chemist-friend and asked for some poison to kill her mother-in-law slowly. The friend gave her a potion that she would drop little by little into the coffee of the mother-in-law who would drop dead in a month. But the friend strictly advised the young wife to be very patient and kind to her mother-in-law so as not to attract attention to her evil design.
So while slowly poisoning the mother-in-law, the young wife treated her very sweetly and kindly. Soon after, the mother-in-law changed and started treating her daughter-in-law very sweetly and kindly, too. This made the young wife guilty and ashamed of what she was doing. She went back to her friend, crying and begging for an antidote to the poison she had been giving her mother-in-law.
Her friend just smiled and said, “That was no poison I gave you, but just some baking powder. What killed her was your kindness. Go home and continue to treat her as you would want to be treated!”
And the mother-in-law and daughter-in-law lived happily ever after.