Too hard to pick just one, so here's a few:
"And did you exchange
A walk on part in the war
For a lead role in a cage? "
-Pink Floyd -
Wish You Were Here
"I've had enough of reading things
by neurotic psychotic pigheaded politicians
all i want is the truth, just give me some truth"
-John Lennon -
Gimme Some Truth
"Why in the world are we here,
Surely not to live in pain and fear,
Why on earth are you there,
When you're everywhere,
Come and get your share. "
-John Lennon -
Instant Karma
"Well come on all of you big strong men, Uncle Sam needs your help again,
he got himself in a terrible jam, way down yonder in Vietnam,
put down your books and pick up a gun, we're gonna have a whole lotta fun.
-Country Joe And The Fish -
Vietnam Song (live at Woodstock)
"In the last second of life, they're gonna show you how
How they run this show, sure, run it into the ground
The stars are projectors, yeah
Projectin' our lives down to this planet Earth
The stars are projectors, yeah
Projectin' our minds down to this planet Earth"
-Modest Mouse -
The Stars are Projectors
Another one from Lou Barlow of Sebadoh/Folk Implosion, Dinosaur Jr. etc. A bit more than one line, but just like (insert powdered drug of choice), one line ain't enough
"Spoiled children soon to fall
Freedom is the lie we live
We will wait for tragedy
And scatter helpless to the fire
Sorry for ourselves
Sorry for the things we've seen
No one cries for help
Waiting for the fire
When all our toys are burning
All these empty urges must be satisfied
Acted outside"
-Sebadoh -
Spoiled