The world will hardly admit of an excuse for a man leaving a coast unexplored he has once discovered.
I had ambition not only to go farther than anyone had done before, but as far as it was possible for man to go.
Do just once what others say you can't do, and you will never pay attention to their limitations again.
I whose ambition leads me not only farther than any other man has been before me, but as far as I think it possible for man to go.
It is better by noble boldness to run the risk of being subject to half of the evils we anticipate than to remain in cowardly listlessness for fear of what might happen.
Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to rank with those poor spirits who neither enjoy much nor suffer much, because they live in that grey twilight that knows neither victory nor defeat.