 The first time Rikud feels pain or discomfort is when
But ever since the engines somewhere in the rear of the world had changed their tone, from the steady whining Rikud had heard all twenty-five years of his life, to the sullen roar that came to his ears now, the feelings had grown. Rikud knew that something which he could not explain had entered the elder man's head for a moment, but it had departed almost before Chuls knew of its existence. But if he wasn't reading himself, Rikud usually went to sleep. Rikud looked and looked until his eyes teared and he had to turn away. Presently Rikud became aware that his eyes were not tearing any longer, and he turned to look at the viewport.
 the light he peered into was too bright, and his eyes hurt as a result.
 the light he peered into was too bright, and his eyes hurt as a result.  he tried to hit his head intentionally.  he experienced hunger for the first time.  he hits his head and bleeds for the first time.