Henry David Thoreau

If you would learn to speak all tongues and conform to the customs of all nations, if you would travel farther than all travelers, be naturalized in all climes, and cause the Sphinx to dash her head against a stone, even obey the precept of the old philosopher, and Explore thyself. Herein are demanded the eye and the nerve. Only the defeated and deserters go to the wars, cowards that run away and enlist.