translation.en: And a testament to this is the thing that most amazes me, most impresses me, and most uplifts me, which is that there is a moral dimension to history; there is a moral arrow. We have seen moral progress over time.
translation.zh: 对这个结论，有一个最令我惊异的实际证明， 它给我留下了深刻的印象，也非常激励我： 历史进程，本身包含了一个道德维度， 存在一个道德指向。可以看到，道德也是随着时间而发展的。