For the third time in as many days we read of the co-mingling of love and truth. Healthy relationships must be important!
It gives John no greater joy than to hear that his children walk in truth. He speaks not of physical children, but of his church. It is a happy thing to see people staying happy in Jesus.
In the life of each congregation there are positive and negative people. Apparently this church had sent out workers and need to encourage and support them -- positive people. And, there was Diotrophes, who loved first place and manipulated people to keep it -- negative people.
The ending says a ton about early church life -- the 'friends' greet you. . .greet the 'friends'. That simple description of a church, "friends", tells us what is normal in church life!