Yuna was a character, who like me, grew up into her religion and it was all she's ever known her whole life. It was something she never questioned until someone on the outside looking in asked the obvious one that was staring her in the face the whole time and she admitted to just how little she knew after all. Even after it was all exposed as a lie she continued to do what was right and eventually came out even stronger for it, in no small part due to friends and family. That always stuck with me. As well as these:

Gray Fox: We're not tools of the government or anyone else! Fighting was the only thing... the only thing I was good at, but... At least I always fought for what I believed in...

Solid Snake: Life isn't just about passing on your genes. We can leave behind much more than just DNA. Through speech, music, literature and movies...what we've seen, heard, felt...anger, joy and sorrow...these are the things I will pass on. That's what I live for. We need to pass the torch, and let our children read our messy and sad history by its light.We have all the magic of the digital age to do that with. The human race will probably come to an end some time, and new species may rule over this planet. Earth may not be forever, but we still have the responsibility to leave what traces of life we can. Building the future and keeping the past alive are one and the same thing.

I could probably go on great length with just the Metal Gear Solid franchise, but I'll leave it at that.