Who said "I have been trained in the art of war."?

This quote is attributed to Dwight Schrute.

I have been trained in the art of war. - Dwight Schrute

"I have been trained in the art of war."

Dwight Schrute War

"I am running away from my responsibilities. And it feels good."

"Fact: Bears eat beets. Bears, beets, Battlestar Galactica."

"When you realize you want to spend the rest of your life with somebody, you want the rest of your life to start as soon as possible."

"I am Beyoncé, always."

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."