One poster suggested that Wittgenstein's preoccupation with language was the result of the ‘poverty of his own experience'. I do not believe this to be true at all, but to explain this in detail would entail too much thread drift. But just one example. Wittgenstein studied engineering and then turned to philosophy. He wrote the book that would eventually earn him a PhD in his spare time, while serving in the trenches as a stretcher-bearer in World War I. He survived the war and gradually repudiated his earlier thinking--and this is also why he is famous: he admitted that his earlier thinking was mistaken. I think there are lessons for aikido here.