How 'Twilight of the Apprentice' explores and showcases alignment within the force will always be one of the best symbolic episodes of Rebels that uses visuals to show off characters' allegiances and placements with the force so well it's gorgeously done.
How it uses visuals to show how Ezra is the closest to the dark side and hints at his balanced path in the future. Ezra touches the carved pillars on Malachor while Kanan doesn't even go close to them but Ahsoka reads them and hovers over them but doesn't directly touch them.
Kanan is a Jedi through-and-through, probably more than the deceased Jedi Order of his childhood because he recognises the balance of attachment and fear that he and Ahsoka help teach Ezra to overcome. He struggles with fear the most but ends up becoming a True Jedi in the purest way he can through teaching Ezra and loving his family.
Ahsoka, meanwhile, isn't a Jedi and doesn't pretend to be—even tells that to Darth Vader himself—and already had her story of developing through this within the Clone Wars but lets us see the aftermath. She still follows and acknowledges the teachings, but isn't held down by them like he struggles with throughout the show. She becomes another mentor to Ezra and offers him his first example of existing beyond the confines of the 'Jedi' and 'Sith'. She shows Ezra sacrifice and another example, alongside Maul who while also exists now in the middle tethers to the Dark Side more dangerously.
And then there's Ezra who is still naive and doesn't understand the force like he tells Ahsoka at the end of the episode before this. But while many padawans start as somewhat blank slates that are shaped by their teachers and their experiences during their training, Ezra already holds a lot of darkness that can be moulded just as much as his light. Ezra definitely ends the show in-between Ahsoka and Maul, but with such a unique and deep understanding of the force through his experience with both sides. He is in the light compared to Maul who cannot let go of his hate or learn to also love and find security in that attachment while also being able to let it go, but is shaped by all three to find his place in the middle. Ezra is light and dark, while Ahsoka is light and Maul is darkness.
I also am probably looking way too deep into this but I love the idea that Maul being underground is meant to represent Ezra's darkness existing longer than either Kanan or Ahsoka realise through Maul being there for years. Maul is the temptation and the understanding of the dark side that Ezra craves due to Kanan and Ahsoka more light standing. Ezra isn't gullible but as he said to Kanan in the episode before this as well, he never connected to living thing before this and if he had met Maul before beginning to open himself up via Kanan he mightn't have been tricked so easily. Just like Yoda said, the Jedi became corrupted through the light side and the war they experienced, just like how Ezra through his teaching of the Jedi actually became more susceptible to the dark side.
