At the bottom the only courage that is demanded of us is to have courage for the most strange, the most singular, and the most inexplicable that we may encounter. That humankind has in this sense been cowardly, has done life endless harm; the whole so-called "spirit-world," death, all those things that are so akin to us, have by daily parrying been so crowded out of life that the senses with which we could have grasped them are atrophied. To say nothing of God.