欲誠其意者，先致其知，致知在格物。物格而後知至，知至而後意誠，意誠而後心正
Wishing to be sincere in their thoughts, they first extended to the utmost their knowledge. Such extension of knowledge lay in the investigation of things. Things being investigated, knowledge became complete. Their knowledge being complete, their thoughts were sincere.
To extend one’s knowledge to the utmost is to go to all extents of knowledge, reaching out to all parts, gathering even the crumbs fallen from the table. It is examining what is cast aside. It means knowing every element so to understand the proportion of each in the building of knowledge. This is the meaning of the wheel as symbol of knowledge, each segment at equal distance from the centre.
The lost teaching within Aikido, part 3
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Aikido RingenKai 