A phrase on justice for Kayle

There's a phrase i recently remembered about keeping the law and justice.

"To do what is right and up-hold the code, one must be changeable, and accept both equally." This phrase very well may be what inspired the two sisters, but i feel like this said from Taric, or even Morgana herself before their final battle finally came to a head... It would at the very least give the winged sword slinger pause, if not consider reconciliation.

To clarify, Morgana only wishes to do what she feels is right, whilst Kayle zealously (perhaps blindly) up-holds the code.