“I celebrate myself, and sing myself.”
The opening celebrates the self without separating it from the wider world that the poem later embraces.
Source details
Song of Myself, section 1 in the 1882 Leaves of Grass text, printed page 29 (Wikisource scan page 35). The retained wording “I celebrate myself, and sing myself” is not the 1855 first-edition opening, which reads only “I celebrate myself”; the synchronized source year is therefore corrected from 1855 to 1882.