Horace Traubel was a close associate of Walt Whitman and one of his executors. This is his contribution to the book Cosmic Consciousness by Maurice Bucke:
May, 1889. That overwhelming night, as I leaned over the railing of the ferryboat, lost this world for another, and in the anguish and joy of a few minutes saw things heretofore withheld from me revealed. Those who have had such an encounter will understand what this means, others will not, or will perhaps only realize it by intimation. I could not separate the physical and spiritual of that moment. My physical body went through the experience of a disappearance in spiritual light. All severe lines in the front of phenomena relaxed. I was one with God, Love, the Universe, arrived at last face to face with myself. I was sensible of peculiar moral and mental disturbances and readjustments. There was an immediateness to it all—an indissoluble unity of the several energies of my being in one force. I was no more boating it on a river than winging it in space or taking star leaps, a traveler from one to another on the peopled orbs. While I stood there the boat had got into the slip and was almost ready to go out again. A deckhand who knew me came up and tapped me on the shoulder. "Don't you intend going off the boat?" he asked. And he added when I faced him and said "Yes:" "You look wonderfully well and happy to-night, Mr. Traubel." I did not see Walt till the next day, evening. In the meantime I had lived through twenty-four hours of ecstasy mixed with some doubts as to whether I had not had a crack in the skull and gone mad rather than fallen under some light and made a discovery. But the first words Walt addressed to me when I sallied into his room were reassuring: "Horace, you have the look of great happiness on your face to-night. Have you had a run of good luck?" I sat down and tried in a few words to indicate that I had had a run of good luck, though not perhaps the good luck he had in mind for me at the moment. He did not seem at all surprised at what I told him, merely remarking, as he put his hand on my shoulder and looked into my eyes: "I knew it would come to you." I suggested: "I have been wondering all day if I am not crazy." He laughed gravely: "No, sane. Now at last you are sane."