"Every person you meet today is either a construction or a demolition project. Your words will make a difference. Will they be weapons for construction or destruction?"-Author unknown
I've usually always tried to avoid breaking folks down with my words but I haven't always emphasized building folks up with my words either.
I've usually felt that words of thanks are not necessarily needed if/when someone is doing what they are supposed to be doing.
I'm now understanding better that this is, in fact, a good thing to do.
Life is short-why not tell folks you are thankful for things?
"No matter what people tell you, words can change the world."-Robin Williams