Like his training! Exactly the thing he abandoned in favour of Han and Leia. Then he loses it again in RotJ, mirroring Anakin losing it in AotC. again because of his attachment to Leia (the same as Anakin with his mother).
I can't see any mirrors.
Luke stops his training because he senses Han and Leia were in trouble.
Anakin took 10 years to go and save is mother because of bad dreams, even thought she was a slave during those 10 years.
Luke choose to fight Vader to protect Leia
Anakin joined the dark side because of vague promises that the dark side saves people from dying, and ironically the first task is to kill a bunch of innocent kids.
There is no way in my mind, of a mirror between the skywalkers actions in each trilogy.
Luke's actions we all can relate too, Anakin's action's? pathetic to say the least.
Of course its based on his caring for his friends. If he didn(t care about them, why would he become hateful to someone who was trying to hurt them?
I think I mentioned a couple of them above.
But the point is that never in the teachings of Kenoby or Yoda there was a hint that he should not be attached to is friends.
Remember as well that the creed isn't "dont care", its "dont get attached".
The jedi care. Obi cares about Qui Gon and Anakin. Qui cares about everyone it seems. Care, but learn to let go when you need to, like both Luke and Anakin should obviously have done.
I don't think other Jedi's attachments have at all been explored.
in the OT is visible that Obiwan cares about Luke like a son. I'm sure he would save Luke's live at any moment (wasn't him there for 18 years or so to look after Luke?)
Attachment is wanting to possess things, even to the extent where your behaviour becomes irrational or hateful. Look at Luke when hes going apeshit on Anakin, hes tasting the darkside power and loving it, and wanting it to protect Leia.
What I really like about the rule is the way that Lucas breaks it. The only two jedi to succumb to these attachments in some way are Anakin and Luke, both the respective heroes of their trilogies and both the 'human' connect to the audience. I get attached to things, because like them, i'm a human with good old human feelings. I would run off to save my friends even when I know in my heart that im irrationally acting off impulse, and I'd be protective (even physically so) if they were threatened.
These must of been the kind of ideas Lucas was thinking of when he decided to explore the "no attachments" idea more fully in the PT.
But it works so far outside of that though. Anakin being unable to let go is the main reason he goes down.
But Luke also did not let go and did not join the dark side, why?
maybe this no attachments thing will be explored in future changes of the OT