Fringe, Season 4

Walter:
So what's in New York?

Peter:
I told you, Walter, it's what's not in New York: Olivia.

Walter:
I admire you, Peter.

Peter:
And why is that, Walter?

Walter:
I told you what the right thing ethically was to do: leaving Olivia. But I don't know that I would have had the strength to do it myself.

Peter:
Is that your way of thanking me for taking your advice?

Walter:
It's a particularly obtuse way to admit that you are a better man than I.

Peter:
Na eisai enas kalyteros andras apo ton patera sou.

Walter:
Is that Greek?

Peter:
Yes. It means "be a better man than your father." It's something I was told a long time ago, but it is very strange to hear you say it.