There is at least one profound line in each OK Computer song. And in this case, the profundity is found in how straightforward some of these lines seem, but in the context of the songs, when you hear them, they're each like a mini-catharsis. You could probably pick an alternative set from this that would be nearly as effective. Been listening to it a lot lately, too, so here are the most profound lines, which are also the most profound sentiments, of each song.
Airbag - "I am born again"
Paranoid Android - "When I am king, you will be first against the wall"
Subterranean Homesick Alien - "I'd show them the stars and the meaning of life / They'd shut me away but I'd be alright"
Exit (Music for a Film) - "We hope your rules and wisdom choke you"
Let Down - "One day I am gonna grow wings"
Karma Police - "This is what you'll get when you mess with us" and/or "For a minute there, I lost myself, I lost myself"
Fitter Happier - "A pig in a cage on antibiotics"
Electioneering - "I trust I can rely on your vote"
Climbing Up the Walls - "So lock the kids up safe tonight"
No Surprises - "Bring down the government / They don't, they don't speak for us"
Lucky - "The head of state has called for me by name, but I don't have time for him"
The Tourist - "Idiot, slow down, slow down"