Witty quotes and turns of phrase

When debating it often helps to have a witty one-liner or quote that helps convey the argument in one immaculately constructed phrase. It's the boxing equivalent of a quick-one-two with the surprise upper-cut. I'd like to hear quotes or one-liners people use when say trying to convince others of political positions, religious beliefs, philosophical leanings, hotly debated scientific subjects, cryptids, UFOs, aliens, or what-have-you.

Here are a few of my favorites:

1. What you disbelieve on faith, I know for fact.
   -me
   
   
2. You know your god is man-made when he hates all the same people you do.
   -unknown
   
   
3. Give me Liberty or give me... well, whatever you think is best for society
   -unknown
   
   
4. Morality by plurality!
   -me mocking the notion of ethics.
   
   
5. Republican: "United we stand, divided we fall."
   Democrat: "Divided we stand, united we fall."
   Socialist: "United we stand, united we fall."
   Anarchist: "Divided we stand, divided we fall."
   -me
   
   
6. Is it better to have loved and lost or never to have lost at all?
   -Rob Schuster
   
   
7. The world is one big I hate you.
   -Clifford H
   
   
8. You need to slow down and take a deep breath. The lack of oxygen is affecting your judgement.
   -Joel
   
   
9. I grew up in the 80s, I know who the enemy is.
   -Kevin on Communism
   
   
10. And, as one of the main differences between a school of thought and a train of thought, a school doesn't move.
    -Kevin
    
    
11. Liquidate your childhood for profit & move on.
    -Les Banks
    
    
12. C's get degrees.
    -Phil Alne
    
    
13. Most ideas from most people are crap.
    -Chris
    
    
14. I hate PC. It offends me.
    -Joel, being politically correct
    
    
15. I wish I had a bucket full of things to throw at you people.
    -Joel
    

Some one liners that are just fun:

1. Never f#

One that's somewhat apropos:

1. If a barber used a straight blade like you use Occam's razor all his clients would be dead.
   -unknown

When the power of love over comes the love of power, the world will know peace

-Jimi Hendrix

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

-Albert Einstein

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

-Albert Einstein

Be careful about reading health books. You may die of a misprint.

-Mark Twain

Don't part with your illusions. When they are gone you may still exist, but you have ceased to live.

-Mark Twain