The cosmos had not chosen humanity after all. In the old timeline, humans had created the apex civilization on earth, but that had been a one-time an… - Liu Cixin

Even Coca-Cola probably tasted medicinal the first time you tried it. Anything addictive is like that.

Some call them doomsday ships. These lightspeed ships have no destination at all. They turn their curvature engines to maximum and accelerate like crazy, infinitely approaching the speed of light. Their goal is to leap across time using relativity until they reach the heat death of the universe. By their calculations, ten years within their frame of reference would equal fifty billion years in ours. As a matter of fact, you don’t even need to plan for it. If some malfunction occurs after a ship has accelerated to lightspeed, preventing the ship from decelerating, then you’d also reach the end of the universe within your lifetime.

"If I’ve set your imagination going, I apologize."
“What do you think I should think about now?”
“In my experience, any thinking is liable to go off the rails. You should just go to sleep.