In the movie Ratatouille, the father rat tells his son:
Django: Take a good long look, Remy. Now, this is what happens when a rat gets a little too comfortable around humans. The world we live in belongs to the enemy. We must live carefully. We look out for our own kind, Remy. When all is said and done, we're all we've got.
I think I understand the last sentence, but it's still not clear to me. I can search for when all is said and done (after considering or doing everything —used for a final general statement or judgment), but there is no result for "we're all we've got".
How would you rephrase that sentence?