NCIS, Season 9

Tony:
[looking at a heart] It's hard to believe they're so small sometimes.

Ducky:
What's on your mind, Tony? You sound a little pensive.

Tony:
I'm not pensive! What is it with everyone and that word? [realizes he's shouting] Sorry. I was --

Ducky:
Would you like to talk about it?

Tony:
You ever have something terrible happen to you and you think you've put it all behind you, but then the terrible comes back and it's more terrible than it was before?

Ducky:
I'm confused.

Tony:
So am I.

Ducky:
Tony, it was very clear to me from the very first day I met you that you were a man in pain.

Tony:
[scoffs] I'm sorry, I think you have me confused with someone else.

Ducky:
No, your pain is as clear to me as Jethro's. He lost Shannon, the one love of his life, and you lost faith in yourself for so many reasons. Jethro coped with his pain by repeatedly marrying the wrong woman, thus ensuring that ultimately he would be alone and safe from heartbreak. You repeatedly chased the wrong woman. You're alone because you never did as you just said: put it all behind you.