There's a tyranny in perfection. Just do things to the very best of your ability. Then move on. - Lewis Pugh

We cannot afford the luxury of cynicism or even pessimism in our reaction to climate change. The situation is too serious. We must tackle it head on – and immediately.

I always tell young swimmers: 'Practice things until you can't get them wrong. Not until you get them right.' There's a big difference.

If you have a passion, follow it. It's the best barometer of what you will be good at. And choose a career that you enjoy – the extra money of a job you detest isn’t worth it.