>>17875Love never literally trancends space and time though.
You see, Anne Hathaway's line was just trailer bait. In a literal sense this is what happened:
Coop sends himself into the black hole to reduce weight and gave Anne Hathaway the best chance for survival.
The black hole contains a tessaract, which Coop assumes was made by futuristic multidimensional humans. The ascended humans needed a method to read the gravity data from inside the black hole so they could exist in the first place, and the method of this transferal would be the love between Coop and Murph.
The tesseract is basically a 3-dimensional representation of the entire timeline of the library. Coop is able to manipulate things in the library such as the orientation of objects, etc, and the whole plan hinges on him using the room to send himself into the future so he can deliver the data to Murph, which requires Murph figuring out that the 'ghost' is her dad through the connection established in things like "STAY" and tugging on the watch's hands.
He completed his task of transmitting the data before being shunted through the wormhole in time to see he daughter die.
Love didn't literally trancend space and time, Gravity did (because it's the only thing that actually can)
Love was simply Cooper's motivation to do so. Figuratively, love trancended space and time, but not literally.