That line of Vader’s makes me think of Matthew 17:20:
He replied, “Because you have so little faith. Truly I tell you, if you have faith as small as a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”
Technically anything would be possible through the Force, it’s the fabric of the universe after all, but actually mastering it to that level is another thing entirely. At least that’s how I’ve always understood it.