将下面这段英文翻译成中文。

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，有一天这个国家会站起来并实现其信条的真正含义：“我们认为这些真理是不言自明的，即所有人生来平等。”