I never knew what basketball was. I started playing on the playground. People used to laugh at me and joke at me because I was so tall and I didn't know the game and couldn't play it.
I try to avoid the temptation with time as a total indicator for what my possibilities are for the marathon. It's the not the best indicator, but it's more how you feel, how you cover the distance and how you are able to do the training afterward.
All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?