I have two main reasons for ...

I have two main reasons for retiring. The first is I can no longer play at a level I was accustomed to in the past. That has been very, very frustrating to me throughout this past year. The second one is realizing my health, along with my family, is the most important thing in the world.
 Mario Lemieux

Quotes from the same author

Certainly we're not satisfied with just winning games. We've been playing some pretty good hockey, but we think we can play much better.
 Mario Lemieux
I've gone through back surgery a couple times, and of course, my radiation treatments for six weeks got me to the point where I was not able to play at the level that I was accustomed to.
 Mario Lemieux
When I'm able to see the ice ahead of time when I get the puck, I'm able to make some pretty good plays.
 Mario Lemieux
I can no longer play at a level I was accustomed to in the past.
 Mario Lemieux
I think that with a lot of hard work and dedication, I feel that I could be the best in the world. I'm still only 35 years old... I have a fresh start physically and mentally, and I feel that I can achieve my goal to be the best again.
 Mario Lemieux