Conscience is determined by man's knowledge and all his way of life.

15、自然赐给了我们知识的种子，而不是知识的本身。

Nature gives us seeds of knowledge, not knowledge itself.

16、知识是宝库，但开启这个宝库的钥匙是实践。

Knowledge is a treasure house, but the key to it is practice.

17、世界上任何知识都不会是没有用的。

No knowledge in the world is useless.

18、如果学习只在于模仿，那么我们就不会有科学，也不会有技术。

If learning is just imitation, then we will not have science or technology.