I remember, as a boy of 17 years of age, this was a fascinating thing for me: how we human beings breathe out carbon dioxide into the air, the leaves of plants pick this carbon dioxide up, and the plant gives off oxygen, which we can breathe in and keep our life going.Percy Julian
From plants that wake when others sleep, from timid jasmine buds that keep their odour to themselves all day, but when the sunlight dies away let the delicious secret out to every breeze that roams about.Thomas Moore
Working with plants, trees, fences and walls, if they practice sincerely they will attain enlightenment.Dōgen Zenji
If we had paid no more attention to our plants than we have to our children, we would now be living in a jungle of weed.Thomas Jefferson