"Of course he is someone else than you. And you might pulse back useful things from him, but if you don't draw a clear line between what was and is you and what was and becomes that other person, you might get sucked into being someone who you would not want to be." His voice is calm and forceful now, clearly speaking to someone younger and less experienced but at the same time taking him for full. Wanting him to see this because nobody else can take the responsibility to figure out that distinction from him.