A different heartbeat made him fall into a process of self-doubt. Who is he?
The seemingly fantasy-like inference has been repeatedly confirmed in life.
Is the person next to you still the same person?
Is he still him?
What about the facts?
Off-topic: Every time I see the expression "I have something to say" in part "These words outside the main text, do you want them to appear above or below the main text?", I feel obscene.