I think what we can all agree on are two big points:
One, our training is NEVER truly over. There is always more to learn, therefore even the best can improve.
Two, ability is good, but ambition is better.
Albert Einstein is perhaps the most well-known genius of all time, but his IQ was trumped by William James Sidis, but no one really cares because Einstein did things with his intellect that Sidis didn't.