The weakest living creature, by concentrating his powers on a single object, can accomplish something: the strongest, by dispensing his over many, may fail to accomplish anything. The drop, by continually falling, bores its passage through the hardest rock; the hasty torrent rushes over it with hideous uproar, and leaves no trace behind.

Thomas Carlyle (1795-1881) Scottish essayist and historian

The Life of Friedrich Schiller, Part 2 (1825)
    (Source)