Authors:

You will hardly know who I am or what I mean, But I shall be good health to you nevertheless, And filter and fibre your blood. Failing to fetch me at first keep encouraged, Missing me one place search another, I stop somewhere waiting for you.

Walt Whitman, Sculley Bradley, Harold W. Blodgett (2008). “Leaves of Grass: A Textual Variorum of the Printed Poems, 1855-1856”, p.83, NYU Press
You will hardly know who I am or what I mean, But I shall be good health to you nevertheless, And filter and fibre your blood. Failing to fetch me at first keep encouraged, Missing me one place search another, I stop