"I really appreciate it when people say "no" to me. I want people to understand that I'm totally supportive of what it is they're trying to do as long as we're all on the same team."

“I'm into books – I love literature, so I toyed with the idea of being an English teacher. I had a fantastic English teacher at school. I think great English teachers make the world go round.”

“What makes a great song - you dont put it into words. You feel it. The perfect lyric. The perfect melody. It makes you feel something.”

“Life is the flight of the alone to the alone.”

“I've been homeless on a few occasions.”

“If you're not willing to sound stupid you don't deserve to be in love.”

“My memory is so bad that many times I forget my own name.”

“I think the more depth you build into the characters, and the more you see where they came from, the more fun you can have. Setting up different characters in different relationships is always helpful as you move forward.”

Source : "It's Always Sunny In Philadelphia's Rob McElhenney, Glenn Howerton, and Charlie Day". Interview with Noel Murray, tv.avclub.com. September 16, 2008.

“You [the teacher] do not merely insert a lot of facts, if you teach them [the students] properly. It is not like injecting 500 cc. of serum, or administering a year's dose of vitamins.”