Ironman is About What You Do Today, Not at the Starting Line.

“What you are is what you have been. What you’ll be is what you do now.” ~Buddha
If the training was easy, then anybody could be an Ironman. The difference between the hopefuls and the world's endurance elite is in how far they'll go to get the job done. The world will constantly throw roadblocks in your path. If it isn't inconvenient training locations and late night parties, then it's amputated limbs, ALS, insulin dependent diabetes, even cancer. We've seen it all and we've seen people beat those difficulties to get the job DONE.
I'm writing this after sweating like crazy on the 10th floor of a hot hotel room, after cranking out an hour on rollers while watching 300 - the movie about Spartan warriors. They remind me of how you have to have a single-purpose focus, the dedication, the drive to win. That's the drive that makes you drag your bike and trainer up the elevator and not give a sh*t about the looks the other people give you. They're not Ironmen. Except that one guy - he looked at me with a knowing smile and nod... He's one of us.
It's not the getting up and throwing on the running shoes for the Saturday morning run after a nice breakfast that makes the difference. That's easy, no matter how far you go. It's the running in a cold rainstorm and heavy wind, barely making it to work on time that defines who you really are. You did it because you said you would. You did it because it's on your plan. You did it because you are separating yourself from the zombie-world around you.
This is what it takes. This is what is revealed at the starting line. Your Ironman race starts today.