Lyric discussion by neonlovechick 

Cover art for One lyrics by Simple Plan

Here's my interpretation:

It's about the teenage/young adult generation.

"We are the ones, the ones forgotten, and this time the future is ours. It’s in our hands" This line is saying that as young adults, we are sometimes forgotten or pushed aside, by parents or society or whatnot, but that in the end, we are the future.

"We’re the tear in your eyes, we’re the blood in your veins, we’re the beat of your heart." This line, as well as all the other lines that start out "We're the..." is talking about the teenagers' parents, especially with this verse:

"We’re the pride of your lives We’re the light shining deep in your eyes We’re the choice that you made We’re the smile on your face when you sleep at night"

"Nothing to lose, together we stand up tall, we are one." That line is saying that as the next generation, we need to work together.

Yeah, so mostly I think this song is about parents and their teenagers and how the teenagers are the future.

Any other interpretations?