Recently, the Prince Harry announced his engagement with an Americanactress. When the media asked him when he decided this girl would be hislifetime partner, he said the moment when he saw her for the first time. Love atfirst sight sounds romantic and many young people believe that the first feelingabout another person is really important, because it always decides whether theycan be couples in the following days. While many old people think love at firstsight doesn't exist, because they need to know the personality, which willdecide the charm of another person. For a relationship, the good firstimpression can bring passion and love, but it can't maintain the relationshipfor lifetime. The way to get along with each other and the tolerance of bothsides are key factors to decide whether a couple can stay forever.