Wherefore, there is a truly limitless diversity in the plant kingdom upon the solar earth; for no two similar plants can be found between two adjacent neighbours, because each entices up different plants from the ground they occupy. And were one of you to journey through the extensive solar areas for many thousands of years, he would indeed constantly come upon new and wondrous species and forms; but he shall not find two plants that completely resemble each other. Behold, from this example alone you can already appreciate why the sun is a perfect planet. The same thing occurs on each heavenly or smaller planet too, but imperfectly. – The Natural Sun, Chapter 1, Paragraph 13