每个人在他的生活中都经历过不幸和痛苦。有些人在苦难中只想到自己，他就悲观、消极、发出绝望的哀号：有些人在苦难中还想到别的，想到集体，想到祖先和子孙，想到祖国和全人类，他们就得到了乐观和自信。 Everyone has experienced misfortune and pain in his life. Some people are pessimistic, negative and despairing when they think only of themselves in their suffering. Some people think of others in their suffering, think of the collective, think of their ancestors and descendants, think of the motherland and all mankind, and they get optimism and self-confidence.