Shoji Nishio stated that he trained under Uesh because he found his morality superior to Mifune Kyuzo's (the great Judo player).
The article is over on Aikido Journal somewhere.
Thanks for the pointer. The article is here:
It deals with a coat stolen from Tohei and some thieves breaking into Mifune's house.
Here's Stan's article going over the essence of what happened in relation to aikido principles:
Personally, I took Nishio's words in more of a budo sense, but rereading it, I can see where one could view it in terms of a spiritual sense.