To Wish Impossible Things

It's a scientific fact that if one person does not train enough, he or she will not be able to finish a race...
I guess that assumption applies to me in a duathlon, but somehow today I managed to finish the race...and surprisingly I was not the last person to finish it (even when we were only 100 athletes).
It was a 5K run, 20K bike and 2.5 run journey, but it felt like a half ironman. It took place in a very beautiful place to train, but at the same time a very hilly street, difficult mostly for cycling.
Even when I have been cycling non-stop (at least once a week) since January, this kind of cycling is very different, because I never ever leave Fundidora, which is a flat and friendly route. SO the lesson here is that I have to get out of my comfort zone, and I have to start challenging myself; even when I have no important races ahead, just to increase speed and strength.
The other relevant learning about today, is that for the first time in my life, I had an "I can't do it anymore" feeling...a very strong one...when I was riding my first out of 4 laps of cycling and I saw that terrible hill, I thought "well first and only one, once I arrive the transition zone I will throw away my bike and go from athlete to spectator"...in the end I decided that it was better to finish last, than having a "DNF" score, so I went very deep into my motivation fountain, and I finished the race.
Anyway, I hated such quitting feeling, and I will fight my entire life to not feel it ever again...
So perhaps people might think it's impossible, and even when you have that "I can't do it anymore" feeling, we always have to remember that NOTHING IS IMPOSSIBLE FOR A WILLING HEART. I am not risking my health, and I am sure I will not get injured if I keep taking care of my body, but quitting a race just because I think I can't do it is worse than finishing last...a thing that today didn’t happen…