What is unknown?

Famous quotes containing the word unknown:

    He had much industry at setting out,
    Much boisterous courage, before loneliness
    Had driven him crazed;
    For meditations upon unknown thought
    Make human intercourse grow less and less....
    William Butler Yeats (1865–1939)

    I was a closet pacifier advocate. So were most of my friends. Unknown to our mothers, we owned thirty or forty of those little suckers that were placed strategically around the house so a cry could be silenced in less than thirty seconds. Even though bottles were boiled, rooms disinfected, and germs fought one on one, no one seemed to care where the pacifier had been.
    Erma Bombeck (20th century)

    By words, by voices, a lost way—
    And here above the chimney stack
    The unknown constellations sway—
    And by what way shall I go back?
    Archibald MacLeish (1892–1982)