God loved the flowers and invented soil. Man loved the flowers and invented vases. – Variation of a saying by Jacques Deval (God loved the birds and invented trees.

We think that diamonds are very important, gold is very important, all these minerals are very important. We call them precious minerals, but they are all forms of the soil. But that part of this mineral that is on top, like it is the skin of the earth, that is the most precious of the commons. – Wangari Maathai (1940–2011), Dirt! The Movie, 2009

On every stem, on every leaf,… and at the root of everything that grew, was a professional specialist in the shape of grub, caterpillar, aphis, or other expert, whose business it was to devour that particular part. – Oliver Wendell Holmes

I think the true gardener is a lover of his flowers, not a critic of them. I think the true gardener is the reverent servant of Nature, not her truculent, wife-beating master. I think the true gardener, the older he grows, should more and more develop a humble, grateful and uncertain spirit. – Reginald Farrer, In a Yorkshire Garden, 1909