And so we beat, endlessly, back against the current ...

... or something like that.

I think what you're searching for is "So we beat on, boats against the current, borne back ceaselessly into the past."
Perhaps so.  It's certainly one of the two.
It certainly is.
This would make a nice pairing with "All My Love's In Vain."
Yes it would.  Blue lights; red lights; green lights.