People believed for a long time that the heart was the center of a person’s emotions. That is why the word heart is used in so many expressions about emotional situations.One such expression is to “lose your heart” to someone. When that happens, you have fallen in love. But if the person who “won your heart” does not love you, then you are sure to have a “broken heart.” In your pain and sadness, you may decide that the person you loved is “hard-hearted,” and in fact, has a “heart of stone.”You may decide to “pour out your heart” to a friend. Telling someone about your personal problems can often make you feel better. Your friend “has her heart in the right place” if she says she is sorry, and shows great concern for how you feel.When you are frightened or concerned, your “heart is in your mouth.” You might say, for example, that your heart was in your mouth when you asked a bank to lend you some money to pay for a new house.If that bank says no to you, do not “lose heart.” Be “strong-hearted.” Sit down with the banker and have a “heart to heart” talk. Be open and honest about your situation. The bank may have a “change of heart.” It may agree to lend you the money. Then you could stop worrying and “put your heart at rest.”