Gary Snyder's Themes in Turtle Island

In Turtle Island, one of the themes I saw was gratitude. I especially saw this theme in PRAYER TO THE GREAT FAMILY. He uses the word throughout the poem. He suggests to treat the Earth like a family member and to give thanks to it. I also saw this theme in WITHOUT. He made me think about what it is like with nature and without nature, which made me grateful for it. THE USES OF LIGHT also has gratitude as a theme. It speaks specifically about how important light is.