It is saying and declaring it positively. A leader must criticize in private, and praise in public. It is proper that somebody or everybody need to be affirm if they are due to it. It is the cheapest way to reward and reorganize the effort and performance of members. It will give inspiration and motivation to others to follow, behave and perform well. To be called and praise especially in public is one big thing to the person who will be described and affirmed.