Then suddenly everything changed. That is, everything was just the same as before—I was crawling along the corridor in just the same way—but the pain and fatigue, passing beyond the level of endurance, seemed to switch something off inside me. Or else just the opposite—they switched something on.

Victor Pelevin, Omon Ra [Amazon, Bookshop, Publisher, Local Library]

 Hermetic quote Pelevin Omon Ra everything changed same as before but pain fatigue passing beyond endurance switch something off inside or switched something on