Teach him to call it 'real life' and don't let him ask what he means by 'real'.

“If you are thirsty, come and drink.”

“Can you lay your hand on your hearts and tell me I'm really alive? Are you sure…”

“I have seen landscapes...which, under a particular light, made me feel that at …”

“When all that says 'it is good' has been debunked, what says 'I want' remains. …”