I'm torn over where I stand on the issue of South Africa's Oscar Pistorius, who will compete in London in the men's 400m and for his nation's 4x400m relay team.
Yes, he's a phenomenal athlete, you can't take that from him. For him to run how he's running with the amputations, I give it up to him.
But at the same time, his body doesn't go through the same things that a regular person's body would go through. He's not able to feel the shock and the pain that comes up from your feet all the way up - it lessens the blow for him.
The fatigue factor is not as great as it would be if he had natural limbs. But then again, for him to run as fast as he's running, there's no rule that says he can't.
As long as you qualify, you should be able to do it. It's not like it's a circus stunt that he's doing, it's not being made fun of or anything else, it's actually a great thing.
But at the same time he doesn't feel everything that everybody else is feeling. But, he's still able to go out there and run fast.
He actually gets to be two types of Olympian - he gets to go to the Paralympics and he gets to be in the Olympics also.
One I'm sure he's going to get a gold medal in, and at the other he's going to be able to be a part of something great and maybe he'll get a medal in his relay, it's possible.
The Games mean a lot to athletes, because you become a part of a select group of phenomenal athletes that all strive to achieve this one thing in their career.
It's one thing to just become an Olympian, but then it's another thing to become an Olympic medalist at the same time. So you have the chance to become a part of two exclusive groups, all in one.
If you manage to get up on the podium and you see your country's flag and hear the anthem, you go through so many emotions - so much is going through your mind.
That's when you really realise that you have done it for your country - it wasn't just for you, you've actually done it for your country. After you finish you're like 'yeah I did it I did it!'
But once your country's national anthem is playing, that's when you think, 'I did this for my country'.
Five-times world champion and winner of four Olympic medals, Maurice Greene will be an expert consultant for Eurosport-Yahoo! during the London 2012 Games.
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- Oscar Pistorius