I think a large part of it was the sheer mental fortitude that he had to persevere in the face of incredible obstacles while at the same time continuing his sci

I think a large part of it was the sheer mental fortitude that he had to persevere in the face of incredible obstacles while at the same time continuing his scientific work. What he was able to do and accomplish given those challenges was absolutely awe inspiring. I can't imagine that there are many people in the world that would be able to break out of the mental prison that his body put him in and accomplish so much in spite of it.