1. Everything in heaven and earth is in harmony with each other. Things compete with natural selection, and the fittest survive.

2. Happiness depends on misfortune, and misfortune depends on happiness.

3. Birth, aging, illness and death are natural laws. Things are extremely contrary, things are prosperous and decline, and the way of heaven is also.

4. Studying nature is associating with famous teachers, and we must not despise nature. -Agassiz

5. Go to the vast nature and listen to its teachings. -Bryant

6. Nature won't deceive us, but we are often deceived by ourselves. -Rousseau

7. There may be errors in art, but nature is right. -Dryden

8. All arts and religions are just appendages of nature. -Aristotle

9. Everything that follows nature is beautiful. -Cicero

1. Nature is the real law. -florio

11. Only by understanding nature. -Bacon

12. the Maker endowed all the mystic Nature grace here, Yin and Yang can be separated. -Tang Du Fu

I found some, please have a look. I wonder if you can use it?