[1] "Song of Myself" is the opening work of the first edition of "Leaves of Grass". The meaning of "leaves of grass" is revealed in this poem: the most ordinary and common grass in nature has a vast world of life and strong life force. It "germinates equally in broad places and narrow places, among black people and It grows equally among the white people.” Whitman believed that grass was his image, his "flag of intention, woven from the green material representing hope", and he wanted to eulogize the motherland and the people in a language "as simple as grass". In the poet's mind, the immortal grass symbolizes the immortal people, the developing United States, the ideals of freedom and democracy.