They don't have DISCIPLINE.
They don't have armor.
Game of Thrones Season 1, Episode 5
Their DISCIPLINE
and loyalty are absolute.
Game of Thrones Season 3, Episode 1
Perhaps you need more scribing work
to DISCIPLINE your mind.
Game of Thrones Season 7, Episode 5
No DISCIPLINE. No training.
Game of Thrones Season 4, Episode 9
You don't have the DISCIPLINE.
Game of Thrones Season 3, Episode 7