Star Trek: Deep Space Nine1993

[Worf has decided to resign from Starfleet, not unlike Sisko had almost done once]

Captain Sisko:
I understand you're headed for the Nyberrite Alliance?

Lt. Commander Worf:
Yes, I leave this afternoon.

Captain Sisko:
For me, it was a job on Earth - directing construction of orbital habitats.

Lt. Commander Worf:
Why did you change your mind?

Captain Sisko:
I finally realized that it wasn't Starfleet I wanted to get away from. I was trying to escape the pain I felt, after my wife's death. I thought I could take the uniform, wrap it around that pain and toss them both away. But it doesn't work like that. Running may help for a little while. But sooner or later, the pain catches up with you; and the only way to get rid of it is to stand your ground, and face it.

Lt. Commander Worf:
But wearing that uniform must remind you of what you have lost.

Captain Sisko:
Sometimes. But it also reminds me of what I've gained, and who I am. Oh, I can throw away the uniform, resign my commission, run all the way to the Nyberrite Alliance. But it really wouldn't matter. A Starfleet officer - that's what I am, and that's what I'll always be.