Coincidence or Providence

I was doing some sermon work this morning. In the middle of my thinking through the passage I am working on, a friend started a chat with me. Since he generally has some good thoughts on the topic I was working on, I asked him for some input. He sent me a link to an article that speaks to the topic, then we chatted about it for a few more minutes. About that time I checked my feed reader and was surprised to see an article, not only on the topic I was researching, but on the very same passage of Scripture I was preaching from.

Coincidence or providence?