The song "Wake Up" by Arcade Fire is an anthem that captures the disillusionment of young adults as they come to grips with the reality that their childhood was full of lies. The first verses describe the speaker's early life as being filled up with nothing and not understanding why. Someone told them not to cry, but now that they are older, they understand that it was a lie.

The chorus then switches to addressing the children of the world. The hook "Children, wake up, Hold your mistake up, Before they turn the summer into dust" implores children to take responsibility for their actions and not let society destroy their youthful spirit. The second part of the chorus describes how, as adults, we grow physically but our hearts get broken. We are all little gods causing rainstorms and turning every good thing to rust. And since we are the cause of the problem, we must adjust to deal with it.

The last lines of the song paint a picture of the speaker seeing where they are going in life with their "lightning bolts a-glowin'" but warning others to "look out below." It suggests that as we ascend into the future, others should be wary of the potential collateral damage left behind.

Overall, "Wake Up" is a powerful call to action that speaks to young adults and the disillusionment they face when they realize they have been fed lies their whole life. The song urges them to wake up and take control of their destinies before society grinds them down.