Wow, losing the “what have I done?” REALLY helps that scene in RotS.
You really think so ? Because only 5 minutes later Anakin has no second thoughts killing Jedi (and kids !) in the Temple. The “what have I done?” line has however a meta value, with Lucas expressing himself through Anakin 😃
“You don’t know the power of the Dark Side. I must obey my master.” -Vader in ROTJ