speaking a blessing

I was about to start reading a book and i just went through the index , one of the chapter read -speaking a blessing.
As i read, it said that each of us have influence over somebody. Though we might not consider ouselves leaders, we have a sphere of influence-somebody or some group of people that looks upto us.
I felt that it is vital to speak good things into the lives of those over whom we have influence.That does not mean we will never disagree with them or have to confront them and correct them,but the general tenor of our words to them and about them should be positive.