One of the worst features about worrying is that it destroys our ability to concentrate. When we worry, our minds jump here and there and everywhere, and we lose all power of decision. However, when we force ourselves to face the worst and accept it mentally, we then eliminate all those vague imaginings and put ourselves in a position in which we are able to concentrate on our problem.
Dale CarnegieObviously, circumstances alone do not make us happy or unhappy. It is the way we react to circumstances that determines our feelings. Jesus said that the kingdom of heaven is within you. That is where the kingdom of hell is, too.
Dale CarnegieDo you remember the things you were worrying about a year ago? How did they work out? Didn't you waste a lot of fruitless energy on account of most of them? Didn't most of them turn out all right after all?
Dale CarnegieWhy prove to a man he is wrong? Is that going to make him like you? Why not let him save face? He didn't ask for your opinion. He didn't want it. Why argue with him? You can't win an argument, because if you lose, you lose it; and if you win it, you lose it. Why? You will feel fine. But what about him? You have made him feel inferior, you hurt his pride, insult his intelligence, his judgment, and his self-respect, and he'll resent your triumph. That will make him strike back, but it will never make him want to change his mind. A man convinced against his will is of the same opinion still.
Dale Carnegie