by Thich Nhat Hanh
You manifested more than 4 and a half billion years ago and life began to manifest on you less that one billion years later. Since then, you have gradually become the beautiful living planet that you are today. Life evolved from deep within the oceans, multiplying and prospering on your body, slowly improving the atmosphere so that countless species could manifest. After one billion years, there was enough free oxygen in the atmosphere to create the ozone layer, which then prevented harmful radiation from reaching your surface, thus allowing life to develop on land.
Via David McConville