Mary Oliver said this quote

Athletes take care of their bodies. Writers must similarly take care of the sensibility that houses the possibility of poems. There is nourishment in books, other art, history, philosophies—in holiness and in mirth. It is in honest hands-on labor also; I don't mean to indicatea preference for the scholarly life. And it is in the green world—among people, and animals, and trees for that matter, if one genuinely cares about trees.