One regret I have is that I did not learn more about what was happening very early, so that I could have tried to stop people from engaging in illegal activities.
My background is somewhat unusual, as I trained to be a ballet dancer. I worked in the theatre for eight or nine years as a contemporary dancer. But as an actor one does read Shakespeare and does try to learn the classics.
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.