请翻译这个句子（英语到中文）：“I have a dream that one day this nation will rise up and live out the true meaning of its creed: ‘We hold these truths to be self-evident, that all men are created equal.’"
我有一个梦想，就是有一天这个国家会奋起，实现其信条的真正含义：“我们认为这些真理是不证自明的，即所有人生而平等。”