Tuvok and Janeway in “Unfinished Business”

Tuvok

It's unfortunate we can't study this phenomenon in more detail. We may not have the opportunity again.

Janeway

Let's hope we never do.

Tuvok

A curious statement from a woman of science.

Janeway

I'm also a women who knows when to quit. Take another look at your tricorder. Omega's too dangerous. I won't risk half the quadrant to satisfy our curiosity. It's arrogant and irresponsible. The final frontier has some boundaries that shouldn't be crossed–and we're looking at one.