The Flight to Lucifer by Harold Bloom

Seth Valentinus got to bed a few minutes after nine that same night. He was accustomed to falling asleep just before dawn and to awakening after only two or three hours. But it had been an unusual day for him. Entering a room at ten that morning, he had stumbled and struck his head painfully on the door. A slight but persistent dizziness had caused him to cancel afternoon appointments. Medical examination had revealed nothing amiss, but the vertigo continued, and he sought relief by retiring at nine. Three dreams came to him before he woke at midnight.

In the first he voyaged upward and outward through a starry realm. The spacecraft seemed familiar to him, and yet a dread of something hovered nearby. "They will not let me through," he heard himself saying. In his distress, he wandered through the ship and somehow emerged beyond it, floating by himself through the starry darkness. Intense pleasure attended his drifting, but the freedom which it reflected ceased when he came down upon a broad flat surface. He stood, a solitary mind among the waste places, hemmed in by endless emptiness.