In her memoirs, Madame Campan, Queen Marie Antoinette's first lady-in-waiting, recollects several of her mistress' acts of kindness. Here are a couple:
A circumstance which happened in hunting, near the village of Acheres, in the forest of Fontainebleau, afforded the young Princess an opportunity of displaying her respect for old age, and her compassion for misfortune. A very old peasant was wounded by the stag; the Dauphiness jumped out of her calash, placed the peasant, with his wife and children in it, had the family taken back to their cottage, and bestowed upon them every attention and every necessary assistance. Her heart was always open to the feelings of compassion, and the recollection of her rank never restrained her sensibility.
Several persons in her service entered her room one evening, expecting to find nobody there but the officer in waiting; they perceived the young Princess seated by the side of this man, who was advanced in years; she had placed near him a bowl full of water, was stanching the blood which issued from a wound he had received in his hand with her handkerchief which she had torn up to bind it, and was fulfilling towards him all the duties of a pious sister of charity. The old man, affected even to tears, out of respect allowed his august mistress to act as she thought proper. He had hurt himself in endeavouring to bring forward some rather heavy piece of furniture which the Princess had asked him for.
Further reading:
Memoirs Of Madame Campan