《论衡·卷三·本性篇》
假使人性像水，可以用水来比喻人性，那就像金成为金是因为它本性是金，木成为木是由于它本性是木一样，人善是由于禀性是善的，人恶也是由于禀性是恶的。
使性若水，可以水喻性，犹金之为金，木之为木也。
Assuming that human nature is like water, and you can use water to act as an analogy for human nature, it is like the reason that gold becomes gold is because its original nature is gold, and the reason that wood becomes wood is due to its original nature being wood. Humans are good because their natural disposition is good, and humans are evil also because their disposition is evil. 