When I was young I was amazed at Plutarch's statement that the elder Cato began at the age of eighty to learn Greek. I am amazed no longer. Old age is ready to undertake tasks that youth shirked because they would take too long.
There was once a professor of law who said to his students. When you are fighting a case, if you have facts on your side hammer them into the jury, and if you have the law on your side hammer it into the judge. But if you have neither the facts nor the law, asked one of his listeners? Then hammer the hell into the table, answered the professor.