The voice of the Great Spirit is heard in the twittering of birds, the rippling of mighty waters, and the sweet breathing of flowers.

There is no great; there is no small; in the mind that causeth all.

Zitkala-Sa (1876-1938) was a Yankton Dakota writer, translator, and educator.  She was also known by her Anglicized married name, Gertrude Simmons Bonnin.