@zhjuan,
If one follow my link to the archive, they will discover I have achived things others said impossible, however, I feel I am a failure in life.
The work in geometry and language were stepping stones to a goal which it seems is now out of reach.
Since I was a very small, I just wanted to be a good husband and father. Nothing special, something I think is very basic.
Well, I don't see that I have anything at all to take pride in except the fact that I am still making free audio and ebooks.