It's a saying from Battlestar Galactica lol
But it's also in the Bible, which is why it was used in the show...the newer one that aired on syfy.
Ecclesiastes 1:9. "What has happened before will happen again. What has been done before will be done again.".
Spoilers for the tv show if you never watched.
"Gaius Baltar survived in the end and can be seen thousands of years later walking a city street on New Earth (our Earth) with the Cylon 7 in the final episode. But he's not a Cylon…so what is the explanation?
All through the series Baltar was accompanied by the being referred to as “Head Six” (not “Head Seven”), who was not actually a Cylon but rather a … messenger/guide … sent by a being we would probably refer to as “God” although he/she/it does not like that name. She only appears to Baltar, choosing to appear as the Model-6 Cylon (Caprica Six) that Baltar had known prior to the Fall of the 12 Colonies.
At the same time, Caprica Six has a messenger/guide who appears to her as Gaius Baltar, also acting as a conscience. Again, only Caprica Six is able to see him. During the 3-part finale of the series, it is revealed that Gaius and Caprica are able to see each other’s “advisor”.
During the epilogue - 150,000 years later - the couple we see reading a National Geographic article over a man’s shoulder were these messengers we have seen throughout the series. This is evident by the fact that the man they are standing immediately behind does not take any note of their presence, despite them speaking in a normal tone of voice only 1 - 2 feet behind him.
Kind of like humans will human, robots will robot, it has happened before, it'll happen again and we cycle on and try to do better.
It's a great tv series..highly suggest you watch. Especially the newer version
