Did i ever tell you about the definition of insanity?-Vaas Monterego

"People should never be afraid of their governments. Their governments must be afraid of their people..."

"And thus my clothe my naked villainy with old odd ends, stolen forth from holy writ, and seem a saint when most I play the devil..."

My favorite so far from V for Vendetta...

"Had to be me. Someone else might have gotten it wrong."

Mordin Solus

patrick is mayonnaise a instrument

This right here is my favorite quote from Telltale games TWD Season One. The way Lee Everett says it including everything Clem and Lee been through made me cry. 

Spoiler:

Perhaps a bit 'heavier' than your average quote, but this is one of my favourites:

"The most thought-provoking thing in our thought-provoking time is that we are still not thinking" ~ M.H.

A person starts to live when he can live outside himself.

- Einstein

"Si Vis Pacem, Para Bellum" - Many philosophers, including Plato.

Latin for "If you want peace, prepare for war" or "Peach through Strength".

I also have this tattooed across by shoulder blades.

A more familiar one:
"Those who do not learn history are doomed to repeat it."
A different one but still the same concept:
'Those who cannot remember the past are condemned to repeat it.'
I love this one,especially since I love history

"The world will not be destroyed by those who do evil, but by those who watch them and do nothing..." - Albert Einstein

"Those who sacrifice liberty for a false sense of safety and security, deserve neither liberty nor security..." - Benjamin Franklin

"If your enemy is covered in all points, be prepared for him. If your enemy is in superior strength, seek to evade him. If your enemy is temperamental, seek to irritate him. If your enemy is united, isolate him. If sovereign and subject are in accord, put division in between them. Pretend to be weak. When your enemy is taking his ease, give him no rest. Strike when your enemy is unprepared. Appear when you are least expected..." - Sun Tzu

"Things turn out best for the people who make the best of the way things turn out."
-John Wooden

"The problem with internet quotes is that you cant always depend on their accuracy" -Abraham Lincoln, 1864

My favorite

“A man should be mourned at his birth, not at his death.”
―Charles de Montesquieu

"From this day to the ending of the world,
But we in it shall be remembered-
We few, we happy few, we band of brothers;
For he to-day that sheds his blood with me
Shall be my brother"
And
"And when he gets there,
To Saint Peter he will tell,
One more soldier reporting sir,
I've served my time in Hell"

We will forsake our countries, we will leave our Mother Lands behind us and become one with this Earth.
We have no nation, no philosophy, no ideology, we go where we're needed, fighting not for country, not for Government, but for ourselves.
We need no reason to fight, we fight because we are needed.
We will be the deterrent for those with no other recourse.
We are soldiers without borders, our purpose defined by the Era we live in; we will sometimes have to sell ourselves and services.
If the time demand it, we'll be revolutionaries, criminals, terrorists.
And yes, we may all be headed straight to Hell, but what better place for us than this?
It is our only home.
Our Heaven, and our Hell.
This, is Outer Heaven.

<3
Metal Gear Solid (Peace Walker)

"Only the dead have seen the end of war." - Plato

"Man those were some good tacos"
-Martin Luther King

"Life is like a box of chocolates"

-Forrest Gump

“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