For five years, he had bathed in an ocean of happiness. The birth of his Xia Xia in particular had made him forget everything about the outside world. The love of his wife and child blended together and intoxicated his soul, and, in this gentle home isolated from the rest of the world, he had fallen deeper and deeper into an illusion: Perhaps the outside world really was something akin to a quantum state, and did not exist unless he observed it.

But it was a state that could no longer endure now that the abominable outside world had burst into his Garden of Eden to confuse and frighten him. His thoughts shifted to Tyler, whose last words still resounded in his ears. Was it really possible for Wallfacers to break free of the vicious cycle, to shatter the iron shackles of logic…?

He jerked to his senses and ran toward the lake. He wanted to shout, but was afraid of scaring Zhuang Yan and Xia Xia, so he just ran as fast as he could through the quiet twilight, the swish of his feet against the grass on the hillside the only sound. But into this rhythm a soft crack inserted itself.

The sound of a gunshot from the lake.

Luo Ji returned home late that evening after the child was sound asleep. Zhuang Yan asked softly, “Did Mr. Tyler leave?”

“Yes. He’s gone,” he said wearily.

“He seemed worse off than you.”

“Yes. That’s because he didn’t take an easy path.… Yan, have you watched TV recently?”

“No. I…” She paused, and Luo Ji knew what she was thinking. With the outside world growing more serious by the day, and the gap widening between life here and life outside, the difference made her uneasy. “Is our life really part of the Wallfacer plan?” she asked, looking at him with that same innocent face.

“Of course. What is there to doubt?”

“But can we truly be happy when all humanity is unhappy?”

“My love, your responsibility when all of humanity is unhappy is to make yourself happy. With Xia Xia, your happiness gains a point, and the Wallfacer plan gains a point toward its success.”

Zhuang Yan stared silently at him. The language of facial expressions she had envisioned in front of the Mona Lisa five years ago seemed to have been partially realized between her and Luo Ji. More and more, he could read her mind through her eyes, and what he read now was, How can I believe that?

Luo Ji pondered this for a long time, and finally said, “Yan, everything has an ending. The sun and the universe will die one day, so why should humanity believe that it ought to be immortal? Listen, this world is paranoid. Fighting a hopeless war is a fool’s errand, so look at the Trisolar Crisis from a different perspective and leave your cares behind. Not just the ones involving the crisis, but everything else from before that. Use the time that’s left to enjoy life. Four hundred years! Or, if we refuse the Doomsday Battle, then nearly five hundred. That’s a fair amount of time. Humanity used the same period to go from the Renaissance to the information age, and in the same space could create a carefree, comfortable life. Five idyllic centuries without needing to worry about the distant future, where the sole responsibility is to enjoy life. How wonderful.…”