what keeps Edgar going? the desire to reach the 100% or perhaps said slightly better, the drive to get all of the artist's desires, beliefs and emotions into a work of art, as near to the original idea as possible. Fully knowing that the 100% is probably impossible, but each time trying nevertheless...and not being affraid to fail along the way.
I'll add two other things that have helped. Firstly the creative energy of Edgar's musical colleagues over the years, directly through their creativity and less obviously by the positive energy they bring to studio and live performances. Fresh faces bring fresh air
Lastly: Strong women, it looks like Edgar loves the challenge...but then again who doesn't?