Lemonstein said:
That's totally wrong. At no point is it said that Luke is in control of what he "takes with him" into the cave.
You mean other than the very symbolic part where Yoda tells him he won't need his weapons and he chooses to take them in, right? Yeah, you can say that Luke's choosing the weapons betrays the unconscious, the desires and emotions he can't control, but I think the more valid (within the philosophy of Star Wars, of course) view is that by choosing the weapons he also chooses the attitudes revealed by content of the vision.