understanding

"I believe in those wing'd purposes,
And acknowledge red, yellow, white, playing within me,
And consider green and violet, and the tufted crown, intentional;
And do not call the tortoise unworthy because she is not something else;
And the jay in the woods never studied the gamut, yet trills pretty well to me;
And the look of the bay mare shames silliness out of me."
- Walt Whitman in 'Song of Myself'