"We are all chasing our dreams..."
"You can never be bigger than the game..."
"If you go, someone else will take your spot. Tennis will live on but you won't.."

"It's nice to be important, but it's more important to be nice."

"I recognize the responsibility of encouraging us all - player and fans alike - to look and act like champions."

This quote is out of his speech he hold when he accepted the position as goodwill ambassador for UNICEF:
"We are given a chance to visit so many different countries and cultures and interact with people from all walks of life. It is our responsibility to connect with the real world beyond our sport, to use our fortune to make a difference in the lives of those who most need it."

"I feel nothing can beat that, the live public. Those are moments of which everyone dreams."

"A man who wins is a man who thinks he can"

Here's another one in response to the "weak era" talks:
"Domination isn't down to poor competition, it's about making the difficult look easy, that's why people say the competition is not fierce enough. "

after winning AO 06... his advice to new players
"Well, you go through up and downs in tennis. It's a very mentally tough game emotionally, I think because you win a lot and you lose a lot, too. You lose usually more than you win in the beginning. You have to stay positive and enjoy it and get good support from family and coaches.
Then, you know, be tough. When the days come, your chance comes along, you want to take your chance and don't choke on it .."

"I fear no one, but respect everyone."

"The only unobtainable dream is the one you never reach for."

"I said I'll take every serve the way it comes, rely on my strengths instead of thinking too much about the other guy's game. To be honest, I remember that match as actually being a bit of a wake-up call and not relying on the other guy's game a little bit, but improving my game."

"When I lose I am disappointed, but I surely respect my opponent when he beats me and thus can congratulate him with a smile."

From his interview after breaking Jimmy Connors' record of 160 weeks at No. 1:
"The number one ranking, obviously that’s going to go eventually, same as the Wimbledon victory as well. But it won’t be a huge blow because I’ll get motivation out of that to get it back."

"To be the best you have to look closely at the details"