“Mistakes are stepping stones to success.”

 Abraham Lincoln quotes (American 16th US President (1861-65), who brought about the emancipation of the slaves. 1809-1865)

 Malcolm S. Forbes quotes

 Henry David Thoreau quotes (American Essayist, Poet and Philosopher, 1817-1862)

 Ralph Waldo Emerson quotes (American Poet, Lecturer and Essayist, 1803-1882)

 Sophocles quotes (One of classical Athens' three great tragic playwrights)