Why I really love the line “Confronting fear is the destiny of a Jedi.” From Luke Skywalker in TROS:

One of the greatest themes of the Jedi, from Luke facing his inner fears in the cave on Dagobah to the Jedi younglings’ test being designed to help them confront their fears in The Clone Wars, to Ezra facing his fears on Lothal in Rebels

to Rey facing her own fears in the dark cave on Ahch-To in her next step to becoming a Jedi, all of them, from the PT to the OT to Rebels to the ST, are about how Jedi must confront the traits of the dark side within themselves. They must confront them.