• United States
4 Jan 07
I don't think it ever is. Would I, myself, go back? Right now, I doubt it, but that may change. I have a friend who had just retired on his 72nd birthday, but he got his doctorate at the age of 53. Another point is that even professors, particularly, the good ones, even have to re-educate themselves to keep themselves up-to-date. At some university gathering attended by Albert Einstein himself, a 19 year old approached him, not knowing who he was talking to. While he knew the name "Einstein" & that he was a great & famous physicist, he asked him, "And what do you do?" Einstein, himself, replied, "I study physics." He did not mention that he was one of the faculty at the university. However, this shows that no matter how much you know, there's a lot more to learn. The universe of knowledge is made up of three main things. 1) What you know 2) What you don't know (that you are aware of) 3) The biggest one that's larger than the first two - what you are unaware that you know or don't know.