Star Trek: Deep Space Nine1993

[Bashir intends to go on a dangerous mission to help Jadzia get into Sto-vo-kor]

Doctor Bashir:
This gives me a chance to honor her memory, and I'm gonna take it. And that, my friend, is my final word on the subject.

Chief O'Brien:
You know what this means, don't you?

Doctor Bashir:
Yes. That I'm risking my life for a very dubious cause.

Chief O'Brien:
No. It means I'm going to risk my life for a friend who's risking his life for a very dubious cause.