The impossible takes a little longer. Never yield in any way, great or small, except to convictions of honour and good sense. Never yield to force and the apparently overwhelming might of the enemy. A pessimist sees a calamity in every opportunity. The unreasonable man adapts his surroundings to himself.
Progress depends upon the unreasonable man.
It's not the size of the man in the fight, it's the size of the fight in the man. Keep your eyes on the stars and keep your feet on the ground. But he who tries, who knows the great enthusiasms, the great devotions, who spends himself in a worthy cause, at best knows the triumph of achievement, and at worst, fails while daring. His place shall never be with those cold and timid souls who know neither victory nor defeat. Even if you're on the right track, you'll get run over if you just sit there.