I loafe and invite my soul,
I lean and loafe at my ease observing a spear of summer grass.

from Walt Whitman – Song of Myself on Rap Genius

Meaning

The speaker invites his soul to join with his physical self, which is lounging in the grass.

The “spear of summer grass” symbolizes the chain of life and all its seasons; while the speaker is aware of his own mortality, he knows that life is cyclical and his physical matter will be transferred to another form. (Perhaps a blade of grass?) This “observation,” in turn, eases his soul.

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