Szczepan Janczuk wrote:
There is old saying from Shingen Buddism, Himalaya:
Everything that doesnt kill you, will reinforce you.
Not for nothing O sensei practiced exercises from Shingen Buddism.
Do you mean Shingon Buddhism? Could not find a Shingen Buddhism.
Shingon Buddhism is an Japanese esoteric form of Buddhism. O'Sensei study Shingon Buddhism in his early years.