our hearts beat as one

How after the loss of Minfilia, he openly disapproved of the way the WOL was practically forced to shoulder the burden of the entire Dragonsong War, save the city of Ishgard, and involve themselves in nearly every aspect of politics post-war:

But as we progress into Shadowbringers and Endwalker, Thancred grows through Ryne and Minfilia, and he finds a reason to be optimistic again with the help of the Scions. He begins to put his trust in the Warrior of Light to be able to do what he can't even hope to accomplish on his own:

And then when the Scions finally obtain the warding scales in Endwalker, of course Thancred is the one who brings up the fact that they'll finally be able to fight by the WOL's side against primals. I love all of these responses because it shows that he wants to do whatever he can to lighten the WOL's burden but at the same time he still believes that the WOL is their guiding light and symbol of hope:

FFXIV I The Light of Hope