There pertains thus to the eye a kind of advance-guard of discovery that gives us a feeling of the unknown wonders that are away in the corner of the sky, quite before the eye is able to take strong visual hold upon them. And, as I say, it makes the universe larger and richer, and not only that, it lays out for us a sort of shadowy avenue along which the eye is encouraged to let its vision run out on experimental and adventurous trips with at least some prospect of being able to return from such excursions laden with more or less of the products of discovery. To people who sometimes lift their eyes above the level of the ground, such evasive hints as distant things give of themselves are very provocative; they tend to make the eye alert, to tax it to its utmost endeavor, to fill it with inquiry, and an interrogation is always the outrider of discovery. And that is the way always that things of whatever kind become known to us, by standing as closely as ever we can to the edge of the known and then feeling our way--not seeing our way, but feeling our way--as far as we can over the edge of the known out into the vast space where, in almost, not quite, utter indistinctness, hovers the unknown. That was the process by which Columbus discovered America. He discovered it by sailing along the line of his presentiment. He reasoned toward it as far as he could and then supplemented the insufficiency of reason by a generous contribution of faith; possest, that is, of so long a reach of thought and so roomy a conception of God's world that there seemed space in it for another Europe, which ought somehow to be there in order to fill that space. And the way in which the discoverer who sailed from Palos discovered a new geographical world is the way in which we have to approach the suspected contents of the religious world, suspected events of Christian history. The sense, the mastering sense, of outlying spiritual territory too obscure for us to say a great many definite things about it, but too certainly there to be denied or ignored, is a necessary prerequisite to all successful use or observance of such a day as we are celebrating. A man whose thoughts stop short at the point where those thoughts cease to move in perfect light can celebrate Easter as a formality, but never as a reality.