[He has so many questions... Who was Esther? Why was he working for the Vatican? When did he start needing glasses? Why had he been called 'Father'? Where was he in Abel's time?

But he refrains from asking any for now, simply closing his eyes and revelling in the sound of that familiar heartbeat. No matter what might separate them - time, space, psychotic murderous nanomachines - this remained the same.]

I think... it has to be real.

[Standing up on Abel's lap, he wrapped small arms around his brother's head and tugged it into his chest, so he could hear Cain's heartbeat.]

See? We still beat at the same time. We're still the same inside where it matters, and that can't be false.