What did the courier brother do to make you feel warm?

I bought some teaching AIDS on Dangdang during the summer vacation of my sophomore year. At that time, online shopping was not so common now. That was the first time I bought something online, and I think it was also the first time I received a courier. I remember it was very hot that day, and I felt like I was melting when I left the air-conditioned room. It seemed to be cash on delivery at that time. I didn't have any change, and I was worried that the other party didn't have any change, so I bought a bottle of water along the way to distribute the money. After arriving, I found that the courier brother was already waiting there, riding a small electric donkey with a lot of couriers on it. My first reaction was to give him the water, as if I didn't say anything. He didn't seem to say anything. Anyway, I finished the delivery soon and left. Later, that night, I received a strange phone call. It's this courier. He called me for it. Then he told me many things, including how he dropped out of school and how he set foot on the society. It feels like he wants to tell me about his life. I still feel a little nervous because of talking to a stranger on the phone. He is almost talking to himself. I'm only halfway through, which means I'm still listening. I can't remember a lot of what he said accurately, but I remember him saying, "I sent so many couriers, and every time someone reminded me to pick them up as soon as possible, only you ran to me and walked back slowly." I don't remember what I was feeling when I hung up. However, this little thing actually had an impact on me. Since then, my kindness to others is no longer based on my mood, but is deliberately remembered. Remember not to forget to express my kindness to anyone, even if I have only met this person once, there will be no intersection in the future. Because this express let me know that my little move may be casual, but it may be printed in the hearts of others, with good intentions and even more harm.