Kirk and Spock in “Unfinished Business”

Kirk

We're a most promising species, Mr. Spock, as predators go. Did you know that?

Spock

I frequently have my doubts.

Kirk

I don't, not anymore. And maybe in a thousand years or so we'll be able to prove it. Never mind, Mr. Spock, it doesn't make much sense to me either.

Spock

A thousand years, Captain?

Kirk

Well that gives us a little time.