“A gentle terrestrial river beast,” Winslow grunted, as though aware of my thoughts. “But you never can tell.”

“No, you can’t,” I groaned. “You never can tell, can you? Why take chances? Why, why, why? Oh, my mind—it’s going.”

Никогда нельзя предугадать. (?)

Или в этом контексте по другому переводится?