I have never had a single positive doping test, and I do not take performance-enhancing drugs.

[The] pain is temporary. It may last a minute, an hour, a day, or a year, but eventually it subsides. And when it does, something else takes its place, and that thing might be called a greater space for happiness ... Each time we overcome pain, I believe that we grow.

Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside and something else will take its place. If I quit, however, it lasts forever.

Marathons are hard because of the physical pain, the pounding on the muscles, joints, tendons.

That was my decision, so I have to be responsible for that. It was one of the biggest mistakes of my life and I don't have a good reason for why I wanted to come back, I don't have a good reason for doing it all.

I have never doped. I can say it again, but I've said it for seven years.

I can get up in the morning and look myself in the mirror and my family can look at me too and that's all that matters.