"Not" makes a big difference in this type of sentence. It brings determination to the conjunction.
If I say "I am not going to watch the Colts play until they get a good O-line", that means I will watch them following the completion of a future event.
If I say "I will play euchre until the sun comes up", then there usually is an implied termination at a certain future event. But that statement rarely might be a rhetorical device that implies the opposite: it is indeterminate. Context has to be our guide in this case.
If I say "I will follow Christ until He returns" that places no determination on my service. It simply means I will be faithful until Faith is no longer relevant.
But "not" is always a sign of determination.
What version are you reading? I am looking for the word not.