Rivka Imeinu showed a deep grounding in the trait of chessed (loving-kindness).
But how did she develop this way?
After all, Rav Miller notes that her family wasn't special. And not only that, but Lavan was a terrible & greedy person.
So what was Rivka's secret to breaking free of her family's middot?
How Did Rivka Imeinu become Who She Was?
(Nachor & Avraham Avinu were brothers; Rivka Imeinu was Nachor's great-granddaughter.)
Avraham Avinu earned widespread renown for his righteousness, wisdom, kindness, and generosity in ancient Mesopotamia.
So Rivka definitely knew about him and what he did.
Furthermore, people passing through or returning to Padan Aram from Eretz Canaan (Eretz Yisrael) reported to Rivka's family about what they saw & heard regarding that side of the family.
So she heard all about Avraham Avinu's astounding dedication to caring for wayfarers.
Yet Rivka didn't just listen to the stories, says Rav Miller. She analyzed them, asked for more details, and internalized the stories.
And she observed that Hashem's prince, a man who only sought to emulate Hashem, went to extreme lengths to imitate Hashem (who spends all day, so to speak, feeding every live thing in the world every day)—this man, Avraham Avinu, made it his mission to also feed the world.
So Rivka Imeinu knew that davka this must be a vital service in the world.
Fruit & Chessed
In fact, fruit is not only tasty & nutritious, but so beautiful that people use fruit (or fruit replicas) to decorate their sukkah. Many people also like paintings of fruit.
And on the day Eliezer came to find a wife for Yitzchak Avinu, Rivka Imeinu prayed to Hashem for the opportunity to bring water to people.
She already supplied her family that day with water.
But she wanted to do more.
That's why she was outside when Eliezer came; she was on the hunt for chessed opportunities.
So even though Eliezer only saw Rivka Imeinu as the answer to his prayers, Eliezer & his entourage were equally the answer the Rivka Imeinu's prayers too.
How to Start Out on the Path of Avraham Avinu & Rivka Imeinu
(My own note: Even if the charity collector claims he desperately needs to use the bathroom, don't let him cross the threshold if you're home without your husband! This happened to my friend: The "charity collector" used the bathroom excuse at my friend's house when her husband wasn't home to expose himself to her young son. DON'T let a strange man into your house unless you have your husband at home with you!!! Don't think that if you have little kids around, then it's okay. Or even if you have a child old enough to prevent yichud—although old enough & big enough to be intimidating is okay—but if your husband is not at home, then no other man comes into your home, no matter what. Don't feel embarrassed or guilty about saying no & closing the door.)
But if you can, it's very good to offer the collector a meal—or a drink at the very least. Rav Miller recommends keeping around food (like chalav Yisrael milk) with kashrut than anyone can eat, plus disposable dishes & cups, for these people.
Rav Miller also encourages us to emulate Hashem's generosity in the following way (page 19):
When you stretch out your hand and give some food to someone, you’re thinking, it's poseach es yadecha, it's the Great Hand of Hakodosh Boruch Hu that is being stretched out; only that I have the privilege right now that this great ideal of Hashem feeding the world is expressed, in my poor little weak human hand.
And also this (page 19):
You should think:
"I am doing the shlichus of Hakodosh Boruch Hu. My hand is His hand and I am emulating this great function which Hakodosh Boruch Hu practices to the world; one of the most outstanding things in all of creation.”
Also, if you ever wondered how Rivka could go out & interact with a strange man, it's because back in those days, towns, villages, clans, and tribes were so protectives of each other that strangers needed to fear, and not the other way around as it is today.
In other words, little Rivka was as safe speaking to Eliezer by the well as she was speaking to him in front of her parents.
(Please see here: Rav Avigdor Miller on Rivka, Our Model)