Grateful heart,there is a song goes like this: gratitude, thank you and I. if everyone knows how to appreciate others, so the world will be full of love. There is a story. There was a young man was very poor, one day, he didn't have a cent, he can't buy food to eat. He had been hungry for three days, almost starved to death, later, he met an old man in the street, the kind-hearted old man gave him a dollar, he bought two loaves of bread, for some, he survived. After that, through their own efforts, he became a rich man. But he didn't forget the old man and the dollar. He knew that if no that a dollar today without him. so