I was actually really happy with where my game was at. That's probably the most disappointing aspect.

That's when you've got to grit your teeth and hang in there and try and find a way to win when you're not playing your best tennis - that's what I can be proud of

Even when I was No. 1 in the world, I was taking it one match at a time. I never was a player to look too far ahead, the way draws can pan out.

When I go out to play, I still believe I'm as good as anyone out there. I don't have to prove anyone wrong. I know what I've done and how well I can play.

I'm fortunate: I can play as long as I want to play. There's no coach or trainer who is going to say to me that I'm dropped or sacked, it's time to move on. I can play as long as I want to play.

Matches are won and lost so many times in the locker room.

When I was a kid in Adelaide, I dreamed of becoming No. 1 in the world, winning a grand slam and the Davis Cup for Australia.

I was lucky enough to win the Davis Cup in my first year in 1999. I won my first slam at the U.S. Open in 2001 and became world No. 1 later that year. By the age of 20, I'd done it all.

I'm not a guy who needs to read motivation books.

Everyone has to call 'time' at some stage.

That's what you do all the hard work for, to play in situations that put your body through gruelling times. If you're not up to it, pull out.

Today evolution of human intelligence has advanced us to the stage where most of us are too smart to invent new gods but are reluctant to give up the old ones.

And if life be, as it surely is, a problem to me, I am no less a problem to life.

Look, it's to the point where kids are getting Botox. It's insane. We're not allowed to age.

The day my son was born my life changed completely.

I don't care what people think or say about me, I know who I am.

Every successful author I know faced crushing rejection early on, and they got back up and kept going.

Anger is precious because it is an immediate, undeniable clue to what our minds (so much more cautious in rejection and resistance than our bodies) will not tolerate.

There are times in history where a particular doctrine becomes a symbol of a greater problem.

I do as much comedy as I possibly can but I'm basically limited by the imagination of the secretaries who make the decisions.

Every evil is a sickness of soul, but virtue offers the cause of its health.