Gundam Seed Destiny - Side note on Talia's words

"If you're to have someone pick up a sword, it's important that it is for a just cause... We can't fight if we can't agree to who our enemies are and why they are our enemies."

The last sentence is an apt description of Athrun's stance now. The scene shows him thinking of Cagalli when they were first onboard Minnerva. She was arguing with Gilbert abt having power. What it means??? I'm presently too tired guessing.

Whereas the first one, I have some comments. Yes, it's impt to have a just cause. Kira's cause was to protect. Athrun's was to end the war swiftly, as he so believed in Dullindal's words then. Shinn??? To be able to protect everything important to him as so said in ep20 (or is it 21??). It's all just, but look at wat happened. The fact is justice is relative, not everyone agree on the same justice,(I certainly can't with Shinn's.) and that at times, they clash. Justice?? Sure, it may be stated clearly in black and white on paper... but what pple feel can't be restrained by that and they will always seek to have their own... and execute it.