Thoreau writes in his journal:
There are two classes of authors: the one write the history of their times, the other their biography (Journal, 1:251).
Ralph Waldo Emerson writes to Margaret Fuller:
Henry Thoreau is coming to live with me & work with me in the garden & teach me to graft apples . . . Will you not print Henry More? & Henry Thoreau? (The Letters of Ralph Waldo Emerson, 2:394-5).