Lyric discussion by pretty_little_enemy 

Cover art for Heaven lyrics by A Skylit Drive

Adding onto the Final Fantasy X reference, (MANY spoilers to the game ahead!)

'Rise! Up on your feet girl. The world awaits your smile."

Yuna is always struggling to get up. Every Aeon takes a lot out of her, the end she falls down trying to grab Tidus and can not bring herself to get up. In Luca, when Tidus becomes her Guardian, she says that Summoners and Guardians are Spiras ray of hope. And that she's practiced smiling when she's sad.

That line keeps getting me!

'Whether we live or die, just remember I'll be alright on the other side. Whether we live or die, just remember I'll love you forever.'

Obviously about when she dies after summoning the Final Aeon/if they will find a way to defeat Sin without their sacrifice.

'As you open your eyes, oblivion sets in. The revolution caved in.'

Yevon misguided her her whole life. Now she needs to find a way to destroy Sin without Yevons help.

My Interpretation