Speak often with one another

Last weekend I was away at a different church and heard some really good sermons. On Sunday evening the sermon was from Malachi 3:16-17:
'Then those who feared the LORD spoke with one another. The LORD paid attention and heard them and a book of remembrance was written before him of those who feared the LORD and esteemed his name. They shall be mine, says the LORD of hosts, in the day when I make up my treasured possession and I will spare them as a man spares his son who serves him'
I had only been talking with a friend earlier in the day saying that as Christians we often find it so hard to speak to each other about the LORD and therefore it is almost unnatural for us and becomes so hard when we try to speak to unbelievers. If we were used to speaking often with one another then it would be natural for the things of the LORD to overflow into our conversation with all people. The verses are a picture of salvation given to us in the old testament and give encouragement to be diligent in our Christian living.