coincidence

Coincidence？
One day in last month, I happened to meet two girls. At that noon, I was just the first time to print my paper. I asked them for help. They kindly told me all the things than told me that to pay the bill I should use the ez-link or cashcard, but since the new ez-link can’t be used that time and I didn’t have the old one. They help me and pay for me the single paper for several cents.
It’s not the unusual thing, because I will also do that if somebody needs help. But something happened unusually next.
After finished my lunch, the two girls found me. They gave me a cashcard and told me that it’s just a gift. At first I was thinking that they had some other purpose, but they didn’t ask me for anything, neither my name or phone number. They said I was a freshman so that they just wanted to help me. Without a time to say thank you, they had gone they left without leaving their names or connecting number.
It’s really a blessing to have such a experience. Even though in this substantial world, people are all searching for their benefits, there are still some kindness and nicety in the world. I happened to meet this, is this a coincidence?
I found my high school’s principal in the photo a newspaper on the March 14th 2009, the front page of strait time!!!
Is it also coincidence?
I think life is full of coincidences, also necessities contain coincidences. If I am not in that high school, she is not my principal; if I’m not in the NUS, never will I meet these two girls.
Coincidence?