In his Olympic career, Michael Phelps amassed twenty-eight medals – an incredible twenty-three of those being gold – both all-time Olympic records. Remarkably, he did so over the course of four Olympic games spanning twelve years.

Michael Phelps has proven himself to be one of the greatest athletic champions of all time. Here are 10 quotes of wisdom from Phelps on high-performance, passion, and persistence to match his illustrious twenty-three gold medals.

If you say can’t you’re restricting what you can do or ever will do.

It doesn’t matter what else is going on. When you walk into your arena or your – whatever you excel at — you’re there to take care of the job that you have to do.

If I didn’t swim my best, I’d think about it at school, at dinner, with my friends. It would drive me crazy.

There are always going to be obstacles that come in your way, stay positive.

People say to me, You’re so lucky. You get to see the world. But I don’t. I go to the hotel and the pools and back again. That’s it.

You can’t put a limit to anything. The more you dream, the farther you get.

I feel most at home in the water. I disappear. That’s where I belong.

With so many people saying it couldn’t be done, all it takes is an imagination.

I wouldn’t say anything is impossible. I think that everything is possible as long as you put your mind to it and put the work and time into it.

When I feel tired, I just think about how great I will feel, once I finally reach my goal.