I&#x27;m not even sure it matters how broad his education was, if (as you said) he has been happy with his life, but also as long as he is adaptable enough to switch directions if he becomes unhappy with his direction later in life.<p>Many of us old folk change direction over the years. The key to a happy life in the long run is not to know everything when you are young, or to have picked the right direction from the start, but to recognize when your direction is no longer fulfilling, and to know when and how to change when you are old.