Don't be like me and be selfish anyway, either. [his voice is wry and self-mocking, but he means it, damn it.] Tadashi's more perceptive than I could give him credit for, and he needs to help people.

[let him help you, is what Callaghan's trying to say here. he's not telling Hiro to tell Tadashi what went on, but there has to be some way that he can let his brother share the burden, something...

Robert sighs, then waves his hand]

You've had enough of my 'wisdom' tonight. The rest, you'll have to figure out, and I hope you have more luck than I have.