Bones, Season 1

Booth:
You don't seem too upset about missing Christmas.

Brennan:
Indications are that Christ, if he existed, was born in late spring, and the celebration of his birth was shifted to coincide with the pagan rite of the winter solstice so that early Christians weren't persecuted.

Booth:
What are you, like, the Christmas killer?

Brennan:
It's the truth.

Booth:
No, it sounds like the truth because it's so rational, right? But the... you know, the true truth is you hate Christmas, so you just spout out all these facts and you ruin it for everyone else.

Brennan:
I ruin the true truth with facts?