There is great power in being encouraged and appreciated. Our self esteem increases when we are affirmed and are made to feel valued. When our efforts are noticed it builds confidence and helps create a sharper focus on beneficial behaviors. I like to think that I am intrinsically motivated, but I also understand how extrinsic affirmation motivates me as well. I need a blending of both to keep moving and I think most people do too. My own appreciation for these comments should spur me to provide the same encouragement to people around me.