Nevertheless, what was made in the hope of transforming the world need not be rejected because it failed to do so – otherwise, one would also have to throw out a good deal of the greatest painting and poetry of the nineteenth century. An objective political failure can still work as a model of intellectual affirmation or dissent.
In our modern world, we look unkindly on mistakes and imperfection. But this is far from the samurai ideal. Mistakes are part of the learning process and if you haven't made them then you are, indeed, dangerous because it means you have never learned anything. Mistakes, to a samurai, are the proof of your learning.